When I first got my phone a cpl years ago, I had really good cell service. There were "dead" zones that other phones had issues with, but I was able to keep talking while going through those zones. I could also use data in those areas.
I don't remember exactly when, but when Cricket/ATT sent an OS update several months back, I no longer get that good of service. The dead zone is actually now much larger than it had been. I also can no longer use my phone inside the house, or even send/receive txt messages without having to set the phone near the outside wall, or step outside.
Is there any way possible to downgrade? Or maybe root and change some setting somewhere? I've already tried doing a factory reset, and that did nothing. Reset APN's to defaults, nada. Even did a Wifi/BT/Network reset to defaults, no go.
Moto G Power (2021) XT2117-1
Android 11
Kernel 4.19.157-perf+
Build number RZBS31.Q2-143-27-9
Baseband version HA10_29.11.02.95.01R BORNEO_NA_CUST
KorishanTalshin said:
When I first got my phone a cpl years ago, I had really good cell service. There were "dead" zones that other phones had issues with, but I was able to keep talking while going through those zones. I could also use data in those areas.
I don't remember exactly when, but when Cricket/ATT sent an OS update several months back, I no longer get that good of service. The dead zone is actually now much larger than it had been. I also can no longer use my phone inside the house, or even send/receive txt messages without having to set the phone near the outside wall, or step outside.
Is there any way possible to downgrade? Or maybe root and change some setting somewhere? I've already tried doing a factory reset, and that did nothing. Reset APN's to defaults, nada. Even did a Wifi/BT/Network reset to defaults, no go.
Moto G Power (2021) XT2117-1
Android 11
Kernel 4.19.157-perf+
Build number RZBS31.Q2-143-27-9
Baseband version HA10_29.11.02.95.01R BORNEO_NA_CUST
Click to expand...
Click to collapse
Before trying other solutions (e.g., downgrading to Android 10), you may want to consider contacting your service provider to see if there is an updated sim card available for Android 11. If your phone is similar to mine, there is no longer the + sign to add new apn's in your network settings. The apn is hard coded on the sim card with no option now to change it in network settings, which would have perhaps been the simplest solution. The other option is to see if there is an update for the apn that your service provider can push through for installation.
sdembiske said:
Before trying other solutions (e.g., downgrading to Android 10), you may want to consider contacting your service provider to see if there is an updated sim card available for Android 11. If your phone is similar to mine, there is no longer the + sign to add new apn's in your network settings. The apn is hard coded on the sim card with no option now to change it in network settings, which would have perhaps been the simplest solution. The other option is to see if there is an update for the apn that your service provider can push through for installation.
Click to expand...
Click to collapse
Ahhh, ok. Good point! Thanks. I'll contact Cricket and see if they may have one. I hadn't even thought of possibly needing an upgraded SIM card.
And yes, you are correct, the APN is all greyed out and the + is missing. I can't even access it from 3rd party options.
KorishanTalshin said:
Ahhh, ok. Good point! Thanks. I'll contact Cricket and see if they may have one. I hadn't even thought of possibly needing an upgraded SIM card.
And yes, you are correct, the APN is all greyed out and the + is missing. I can't even access it from 3rd party options.
Click to expand...
Click to collapse
While I appreciate your 'Thanks', please learn to use the 'Like' button when logged in (previously known as the 'Thanks' button). It's a longstanding XDA courtesy when members try to help or provide roms/guides etc,. for members use.
Related
All of a sudden I can no longer use my phones data. WiFi works and calls/text works but no internet. Tech support has opened a ticket but does anyone know what's up?
Rooted, venom rom.
nash2000 said:
All of a sudden I can no longer use my phones data. WiFi works and calls/text works but no internet. Tech support has opened a ticket but does anyone know what's up?
Rooted, venom rom.
Click to expand...
Click to collapse
So no recent changes on the phone that may have caused this? New ROM, new apps, settings changed, anything like that?
Make sure its not something silly, like Mobile Data toggled off somehow (maybe by an app or widget?). Check your APN.
If no recent changes, just might be an issue on AT&T's part, such as a network issue or they screwed up something on your account. For that matter, did you happen to make any changes to your account recently? I've seen instances where they have accidentally shut off folks data plans while making other unrelated changes.
If you have an AT&T store nearby, you can try to take it there. They can not only take a look at your account to make sure it properly provisioned, but can also give you a new SIM for free, to eliminate that as the problem.
redpoint73 said:
So no recent changes on the phone that may have caused this? New ROM, new apps, settings changed, anything like that?
Make sure its not something silly, like Mobile Data toggled off somehow (maybe by an app or widget?). Check your APN.
If no recent changes, just might be an issue on AT&T's part, such as a network issue or they screwed up something on your account. For that matter, did you happen to make any changes to your account recently? I've seen instances where they have accidentally shut off folks data plans while making other unrelated changes.
If you have an AT&T store nearby, you can try to take it there. They can not only take a look at your account to make sure it properly provisioned, but can also give you a new SIM for free, to eliminate that as the problem.
Click to expand...
Click to collapse
No changes at all, same Rom for months and months. AT&T couldn't find anything but a tech guy will call be back within 36 hours. Should I just reset the phone
nash2000 said:
Should I just reset the phone
Click to expand...
Click to collapse
You mean a factory reset, or just reboot? I'd certainly try a reboot (if you haven't already).
Factory reset might not hurt (might even solve the issue) as long as you have a method to back up all your data (Titanium, etc.). But it seems a little drastic, to me.
Did you try to toggle off LTE, and see if you can get any data? Folks have had some issues with Viper (and other "Euro" based ROMs) on AT&T's LTE network. Although its mostly been with voice calls while on LTE. So its just a bit of a shot in the dark on my part.
redpoint73 said:
You mean a factory reset, or just reboot? I'd certainly try a reboot (if you haven't already).
Factory reset might not hurt (might even solve the issue) as long as you have a method to back up all your data (Titanium, etc.). But it seems a little drastic, to me.
Did you try to toggle off LTE, and see if you can get any data? Folks have had some issues with Viper (and other "Euro" based ROMs) on AT&T's LTE network. Although its mostly been with voice calls while on LTE. So its just a bit of a shot in the dark on my part.
Click to expand...
Click to collapse
I've done multiple reboots and toggle data a few times as well. Not sure what else to do, certainly not waiting 2 days for att to get back to me.
It hasn't been blacklisted has it. Bc similar situation happen to me :/
Sent from my HTC One_M8 using Tapatalk
About 8-10 months ago.....maybe a little longer, my wife and I purchased two LG K7 (LG-K330) on the Family Mobile plan (T-mobile). I have had zero problems with my phone. My wife on the other hand is having some bizarre problems and she's blaming me for them. Here is a small list of some of the problems:
1. Being blocked from websites that she has been to on several occasions.
2. When going to a website, she will get either redirected or a screen saying 404 Error and one that states she does not have permission.
3. On Facebook, she has lost the ability to access all of her settings. Her "Sharing" configuration has changed and she can't set it back. And she's saying that she doesn't have the same amount of access that she had previously.. She says that sometimes she can't access links in Facebook and when she tries it bounces her right back to where she was.
She has been poking around the phones files and she claims that there are very similar file on my laptop computer. Now she thinks I am trying to limit her access and phone usage. For all I know, she has deleted something that needs to be on the phone. My question is has anyone experienced something like this before and if so, is it repairable? One more note on this matter. This is the fourth phone that this has happened on. The others were Samsung's.
Any help would be greatly appreciated because I can finally prove to her that I'm not smart enough to "hack her phone.
LG K7
Provider: Family Mobile
Model LG-K330
Android ver. 5.1.1
Security Patch Level: 2017-04-01
Build Number: LMY47V
Software ver. K33011g
Phone has never been rooted and has stock firmware. It has been connected to my laptop a couple of times to transfer photo's.
That's a bizarre problem to be having. But have you tried factory resetting it? Back up important files like photos beforehand. This honestly sounds more like a problem with the network than the phone. Have you been using the network? Make sure your DNS is correct and that your network isn't being limited.
Billybobjoe13245 said:
That's a bizarre problem to be having. But have you tried factory resetting it? Back up important files like photos beforehand. This honestly sounds more like a problem with the network than the phone. Have you been using the network? Make sure your DNS is correct and that your network isn't being limited.
Click to expand...
Click to collapse
I swear it's her doing it somehow. It happens to every phone she has used. I have done several factory resets and it hasn't helped. She used our wi-fi connection at home ALL the time. I'll check out the DNS and see if it's being limited. But I would think that I would be having the same problem as I use the network a lot too.
Hey Billybobjoe, I have some additional information that might clarify the problem. She says she cant reach "https" sites, she can only see part of her Facebook page, the permissions are growing and sharing is a lot worse. She says she can't really get to a "real" website(it says something about "there is no cache for the page". She also states that she can no longer change her privacy settings on Facebook and that she thinks her phone is heavily connected to Russian social media websites.
Does this help in any way? Thanks in advance for all your help in this matter.
Billybobjoe13245 said:
That's a bizarre problem to be having. But have you tried factory resetting it? Back up important files like photos beforehand. This honestly sounds more like a problem with the network than the phone. Have you been using the network? Make sure your DNS is correct and that your network isn't being limited.
Click to expand...
Click to collapse
Hello.
I recently purchased an unlocked AT&T model V10 and am using it on Metro PCS.
The phone is having a hard time making and receiving calls. It will take a long time for an outbound call to begin (or will not even go through after a lengthy wait), and many calls are not being received and going straight to voicemail.
The problem and severity is intermittent, sometimes it will work without issue and other times no calls can be made or received for some time.
The data connection appears to be solid whenever it is being used, it just appears there is a problem with the phone trying to negotiate from a data connection to a GSM cellular connection.
Any input would be greatly appreciated as I have been searching around and have not had any luck. I've tried reseating the SIM, factory resets, etc.
Thank you.
MAybe wrong rom on it? Did you try reinstall software with lg bridge?
klemen241 said:
MAybe wrong rom on it? Did you try reinstall software with lg bridge?
Click to expand...
Click to collapse
I'm running the factory AT&T install, so no custom rom - I will try LG Bridge and see if there are any available updates.
Thanks for the tip, I haven't done much with LG phones before - I am certainly open to rooting the phone / trying a custom ROM to see if that will sort things out. It just seems like either a setting (I tried all different APN settings to no avail) or a software issue as it does work, just not consistently.
en5 said:
I'm running the factory AT&T install, so no custom rom - I will try LG Bridge and see if there are any available updates.
Thanks for the tip, I haven't done much with LG phones before - I am certainly open to rooting the phone / trying a custom ROM to see if that will sort things out. It just seems like either a setting (I tried all different APN settings to no avail) or a software issue as it does work, just not consistently.
Click to expand...
Click to collapse
there are custom roms for h901, other than that no custom roms
klemen241 said:
there are custom roms for h901, other than that no custom roms
Click to expand...
Click to collapse
Thanks, I noticed that I was having trouble finding an update past H90021w online and the phone shows no update available (I was previously on H90020j).
So now Wi-Fi calling is an option, however it does not let me enable it, it just sits on "Processing" until eventually it gives me an error connecting with the network. I turned it on manually through the SVC menu and it shows it as enabled in the settings, but I don't think it is actually working as it doesn't give any indication as to whether or not it s on a Wi-Fi call.
Looks like I'm running out of options and may need to go with a different phone.
en5 said:
Thanks, I noticed that I was having trouble finding an update past H90021w online and the phone shows no update available (I was previously on H90020j).
So now Wi-Fi calling is an option, however it does not let me enable it, it just sits on "Processing" until eventually it gives me an error connecting with the network. I turned it on manually through the SVC menu and it shows it as enabled in the settings, but I don't think it is actually working as it doesn't give any indication as to whether or not it s on a Wi-Fi call.
Looks like I'm running out of options and may need to go with a different phone.
Click to expand...
Click to collapse
yea you had bad luck with this one, v10 is great phone, but no custom or anything. I am luchy i have 960a, so everything works haha
You needn't read this thread. There is nothing of any import here.
I was unable to learn how to delete it, or I would have.
As I mentioned below, I manually updated this phone to Nougat using the LG Bridge program. It complicates matters that I can't remember the exact time-frame for issues. I do remember getting real-time traffic updates using google maps even after I upgraded to Android 7. And I did stream Netflix once while on a 12 hour roadtrip, but I can't remember if that was before or after the road-trip. I have found and tried many APN's for the H2O service. Some are supposedly specifically for the G5, others just for mms or internet. Most recently, I did a factory reset after backing up my personal data and media. Twice now actually. The first time, I ran the backup software soon after resetting and when things hadn't changed, I surmised that maybe I was just importing the problem back onto the phone in my settings or something, so I reset again and this time only chose two of the settings categories near the top of the list since they seemed separate to the navigation programming.
I'm going to reset again now and see if the maps work with a stock setup, then see if I can slowly add things one at a time and continually monitor the data functionality.
If a moderator sees this and can delete this post, I would appreciate it since it doesn't seem like it could be helpful to anyone else the way it is. If I am successful in getting the data working and this thread still remains, I will post the process I had followed to achieve that in an "Issue Solved" heading at the bottom. Everything between the snowflakes (*****) is the older post and edits.
*****
History of Issue(s):
>This is my first smartphone and my first Android device
> Bought phone used off swappa running MM 6.?
>Have owned phone for around 8 months
>Volume down button wasn't working, figured I could live with pressing vol up and moving it down manually.
> Thought it would be good idea to upgrade manually to Nougat (10h update) Using LG bridge (about 5 months ago?)
> My carrier is H2Owireless, an AT&T MVNO
> Used to have internet, google maps real-time traffic used to work, Netfilx used to work (both without WiFi).
> Could make calls, send texts, listen to Pandora or Spotify and use my Maps for commuting to work.
> Couldn't send MMS pic msgs.
> Began to learn about APN's and what the different network settings did.
>Tried many APN's and fotzed around with Global, LTE/CDMA, LTE/GSM/UMTS and the submode settings
>Can get 4G and LTE , often have to switch back to Global setting to send SMS/MMS
> Had H2O set up APN as best they knew and network settings to what they felt would work best
> Can do anything and evrything when Wifi is enabled (that's never been an issue)
> I thought phone had bricked about 2 months ago while on a roadtrip.
> Discovered on forum that I could swap cam plus for chin and power on that way.
> Turned out power button was no longer functional
> Learned about vol up + charger to power on phone (use an app to power off and restart phone)
> took off cam plus so I could have phone in case.
And now, I'm standing at the edge of a very deep rabbit hole with a phone that can't use mobile data for most internet access (spotify works, Pandora never worked very well). I've discovered that the version of Nougat I'm running is problematic (update 10h Brightpoint) and that my forcing the update to Nougat might be largely responsible for these issues.
I see myself having a choice between learning how to flash the phone back to Marshmallow, or learning how to flash it up to update 21c... or live without mobile data for most of the functionality I wanted from the phone...
I seek advice from the the forum for which of these options people think I might best choose. Do I need to acquaint myself with these programs used to flash the ROM? Does it seem to you readers that my problems are symptomatic of those which are best rectified by flashing up? Or rolling back to Marshmallow...
I just want to be able to google something while I'm away from wifi.. to get traffic updates while I'm using the navigation.. to listen to spotify.. maybe even watch something on netflix... (calling, SMS and MMS functionality is a given, but I do still have them for the most part).
I can pick things up if I read tutorials / guides... I've flashed PC BIOS before... I could figure it out if I needed to...
But maybe I just need a new chin or clean it? Maybe I should factory reset? Maybe there's other potential causes I'm unaware of?
Any and all suggestions are welcome. It's late here and I won't be reading any responses until tomorrow at work.
Thanking you very much in advance. --Wayne
Edit: I was about to check LG Bridge to see if there was an update available for nougat.. thought I would get this out there first since I was pretty sure I wouldn't get both done tonight..
3rd edit: I checked for LG update, nothing available. I finally decided to factory reset before getting into flashing. That seemed to fix the google maps issue as it seemed to be working without WiFi enabled (I say 'seemed' because my office is slightly below grade and getting a good signal is tough. If it's not working, the address remains grayed out and the connection just buffers, the address filled in after the reset. Then I decided to move some of the things I had backed up from the SD card but neglected to deselect the settings box. After restoring much of what I had backed up, It seemed more like how it had been before the reset. I noticed a small icon next to the signal type and strength meter at the top which hadn't been there before the reset (a small white square with rounded edges that has a zig-zag line going through it that kind of looks like a jagged "N"). Instead of saying offline, the app says poor connection, so I will test it on my way home.. I am hopeful. It seems promising. If I have to reset again, I will deselect settings and set things up fresh; I think that will help. I am beginning to think this isn't so much about my OS or any hardware failure as it is the H2O at&t mvno being throttled or something similar. Even when I'm getting 4 bars of 4G, the maps loads very slowly.. nothing at all like it does on WiFi.
I'll post a final edit after I try it out on the ride home this evening.
*****
I tried to changed APN manually to rogers but still data does not work, only call and text works. Is there a solution to this? I believe i got Pro 2 (cn with global rom installed)
I had the same issue, below is the APN setting on Rogers website, I've found that if you make the following changes, it will connect to 4G data (until you restart your device)APN Type: replace "internet + mms" with "*"
MVNO: ROGERS
MVNO type: SPN
This will get you connected.
However, I ran into another problem after configuring the network this way. After restarting the device, the phone can no longer detect the SIM card, and has an error message prompting restart).
This is my problem after restarting:
Comparing with other phones, the auto detected APN Type is typically "default", but entering default will cause the connection issue right away. The "*" will allow you to run until device reboot.
I too would like help on how to resolve this. Seems more software than hardware problem since it only fails after boot.
Mobile APN Settings
Parameter NameParameter ValueAPNltemobile.apnMMSC
http://mms.gprs.rogers.com
MMS Proxymmsproxy.rogers.comMMS Port80APN Typeinternet + mmsAPN ProtocolIPv4/IPv6APN Roaming ProtocolIPv4/IPv6All other settingsBlank/default value
@GSKC
I just tried your method looks like it works and as you said it doesn't work after reboot. However when I did "Network setting reset," I was able to connect to 4g again (but resets wifi passwords too). Hopefully there's a solution...
I noticed that this problem only happens if there is a SAVED wifi network WHEN the device BOOT up.
I did a factory reset, then enter the APN manually. I was able to connect to stable network.
I did a system restart, no issue. The phone reconnects to the network automatically after booting.
I connect to a wifi network. The phone still works fine.
I restart the device again, the problem comes back.
If I take out the SIM and only use the Wifi, the phone is also okay.
The only time when it doesn't work is when I have both, which is the normal use case.
Something is happening in the firmware between the wifi and the SIM during the boot sequence.
This problem exists on my Lenovo L70081, Legion Phone Duel 2 Pro, running OS 12.5.188 ST, updated using Rescue and Smart Assistant v5.8.0.25
Any help would be appreciated.
GKSC said:
I noticed that this problem only happens if there is a SAVED wifi network WHEN the device BOOT up.
I did a factory reset, then enter the APN manually. I was able to connect to stable network.
I did a system restart, no issue. The phone reconnects to the network automatically after booting.
I connect to a wifi network. The phone still works fine.
I restart the device again, the problem comes back.
If I take out the SIM and only use the Wifi, the phone is also okay.
The only time when it doesn't work is when I have both, which is the normal use case.
Something is happening in the firmware between the wifi and the SIM during the boot sequence.
This problem exists on my Lenovo L70081, Legion Phone Duel 2 Pro, running OS 12.5.188 ST, updated using Rescue and Smart Assistant v5.8.0.25
Any help would be appreciated.
Click to expand...
Click to collapse
Im on the same OS version 12.5.188ST, my phone connected to data absolutely fine with no problems but after every few hours stop making or receiving calls. I did the following and its fine for some time now but I'm not sure whether this will work with every phone but no harm in trying :
settings.....cellular network and sim.....5G mode. By default (at least in my phone) it is on NSA, I first switched to NSA+SA but to no avail, than I switched to SA and vola problem solved, all incoming outgoing calls working bang on but I think now my phone doesn't go on 5g which is still not good but at least making calls as normal. Now, as I said, this procedure might not work for everyone but try it, cheers.
vtec303 said:
Im on the same OS version 12.5.188ST, my phone connected to data absolutely fine with no problems but after every few hours stop making or receiving calls. I did the following and its fine for some time now but I'm not sure whether this will work with every phone but no harm in trying :
settings.....cellular network and sim.....5G mode. By default (at least in my phone) it is on NSA, I first switched to NSA+SA but to no avail, than I switched to SA and vola problem solved, all incoming outgoing calls working bang on but I think now my phone doesn't go on 5g which is still not good but at least making calls as normal. Now, as I said, this procedure might not work for everyone but try it, cheers.
Click to expand...
Click to collapse
Thanks for the suggestion, unfortunately setting the 5G setting didn’t help. I also tried disabling 5G but I still have the issue.
Was your OS able to read the APN from your SIM or did you have to enter the APN manually also?
GKSC said:
Thanks for the suggestion, unfortunately setting the 5G setting didn’t help. I also tried disabling 5G but I still have the issue.
Was your OS able to read the APN from your SIM or did you have to enter the APN manually also?
Click to expand...
Click to collapse
I didn't mess about with apn, as I said in my earlier post I had no problems using data its always connected but I had problems with making and receiving calls, cheers
There's currently two ROM available on Rescue and Smart Assistant:
L70081_ROW_SECURE_USER_Q00017.0_R_ROW_12.5.188_ST_210819_qpst
L70081_EE_SECURE_USER_Q00017.0_R_ROW_12.5.137_ST_210710_sec_qpst
What's the difference between ROW and EE rom?
Which would work best in Canada and US?
is ROW only updated in Asia and Pacific?
i sort of had this same problem with Tmobile. it would only connect to 3g . if i connected to the 4g or 5g network i lost everything . i was able to fix it using my ROOTED phone and an app in the playstore called network guru. I used that to turn off majority of the network bands and only left the ones listed for the phone. My service was immediately fixed and havent had any trouble since
tinman4209333 said:
i sort of had this same problem with Tmobile. it would only connect to 3g . if i connected to the 4g or 5g network i lost everything . i was able to fix it using my ROOTED phone and an app in the playstore called network guru. I used that to turn off majority of the network bands and only left the ones listed for the phone. My service was immediately fixed and havent had any trouble since
Click to expand...
Click to collapse
Can you go into more detail and steps? I actually switched from tmobile to att after I couldn't get it work. I would rather be on tmobile.
superrama said:
Can you go into more detail and steps? I actually switched from tmobile to att after I couldn't get it work. I would rather be on tmobile.
Click to expand...
Click to collapse
I know how ya feel, I pestered TMobile for 2 weeks and they were no help. They kept trying to push me off to Lenovo who was absolutely no help at all. Id go thru their website which connects you to Motorola. Then they would tell me they don't support the phone because it's Lenovo and give me a link to follow. Id follow that link which led me right back to Motorola lmfao.
After 4-5 times of going thru that nonsense I finally got someone who knew what they were doing. They told me because this phone was never released in the US I need to go thru their European server for assistance. Screw that, I did some more research and got the idea of trying this from some ancient post I found on xda lol.
It's actually very easy as long as your phone is rooted. download the app, click the 3 dots and go into force control. Then adjust the carrier bands so only the ones supported by the phone are selected. Then reboot your phone and it should kick over to a working signal . If not ya might have to monkey around in the service menu using the dial code *#*#4636#*#*
Here's a few screenshots to give ya an idea and a link to a website with all the bands listed. https://www.kimovil.com/en/frequency-checker/US/lenovo-legion-2-pro
tinman4209333 said:
I know how ya feel, I pestered TMobile for 2 weeks and they were no help. They kept trying to push me off to Lenovo who was absolutely no help at all. Id go thru their website which connects you to Motorola. Then they would tell me they don't support the phone because it's Lenovo and give me a link to follow. Id follow that link which led me right back to Motorola lmfao.
After 4-5 times of going thru that nonsense I finally got someone who knew what they were doing. They told me because this phone was never released in the US I need to go thru their European server for assistance. Screw that, I did some more research and got the idea of trying this from some ancient post I found on xda lol.
It's actually very easy as long as your phone is rooted. download the app, click the 3 dots and go into force control. Then adjust the carrier bands so only the ones supported by the phone are selected. Then reboot your phone and it should kick over to a working signal . If not ya might have to monkey around in the service menu using the dial code *#*#4636#*#*
Here's a few screenshots to give ya an idea and a link to a website with all the bands listed. https://www.kimovil.com/en/frequency-checker/US/lenovo-legion-2-pro
Click to expand...
Click to collapse
How do you root the phone?
GKSC said:
How do you root the phone?
Click to expand...
Click to collapse
Tutorial: How to Update, Unlock bootloader and Root your CN with Global Rom phone
I received my phone today from Aliexpress and was able to update, unlock bootloader and root my phone so I want to share the steps. Follow them at your own risk, I take no responsibility for any issues or bricking. You should always backup your...
forum.xda-developers.com