Random SIM disconnects - Xiaomi Redmi Note 3 Questions & Answers

Hello,
I have the Note 3 Pro. Since I got it about a year back it's always had this problem: the sim just randomly disconnects and I have to insert the pin again. Most of the time this happens when i come back home and, presumably, it connects to wifi, but sometimes just driving and i find it's been disconnected for god knows how long.
Anybody else had this issue? Thanks!

carthago133 said:
Hello,
I have the Note 3 Pro. Since I got it about a year back it's always had this problem: the sim just randomly disconnects and I have to insert the pin again. Most of the time this happens when i come back home and, presumably, it connects to wifi, but sometimes just driving and i find it's been disconnected for god knows how long.
Anybody else had this issue? Thanks!
Click to expand...
Click to collapse
Hi man!!
I often had this issue. I sent my phone to the service center and they told me everything looked OK, btw, they re-screwed all screws and now it seems to be better.
By the way, the best way for me to avoid that has been to use a tiny (which is really against the phone) and hard case, in my case iPaky gives no problem with PIN, without it, sometimes it fails.
Regards!

Don't use radon kernel.

i had the same problem on radon

I'm not sure it's anything to do with Radon, as I dirty-flashed RR back to the standard kernel and continue to get disconnected SIM 2. It would be nice if there was a way of getting the system to reprovision the SIMs via Tasker or eRobot when this happens, as I have to reboot the phone for the SIM to be recognised again.

Redmi note 4 sd
I just keep the SIM pin with my keys and just push the tray out and in again, whenever this happens (a lot). I know you're not supposed to do this with the phone on but restarting takes more of time. By the way my wife has a redmi 5 plus and the same problem.

Tbh I also sometimes face this issue with AGNi kernel, whenever that happens I restart my phone and the sim start working.

Has same problem from more than year and tried both nougat and oreo rom's and same problem but i am using hybrid sim adapter for using 2 sim+ 1 sd card , it's not a hybrid sim adapter problem cause it works fine on other devices.
What's the solution ? i am tired of this sh*t.

akhil17kr said:
Has same problem from more than year and tried both nougat and oreo rom's and same problem but i am using hybrid sim adapter for using 2 sim+ 1 sd card , it's not a hybrid sim adapter problem cause it works fine on other devices.
What's the solution ? i am tired of this sh*t.
Click to expand...
Click to collapse
If u use sim2 data then it will disconnect. Sim2 only for calls.

carthago133 said:
Hello,
I have the Note 3 Pro. Since I got it about a year back it's always had this problem: the sim just randomly disconnects and I have to insert the pin again. Most of the time this happens when i come back home and, presumably, it connects to wifi, but sometimes just driving and i find it's been disconnected for god knows how long.
Anybody else had this issue? Thanks!
Click to expand...
Click to collapse
Same problem here, the rom and everything I use, still the same. Not sure what happend, but this is happening to me the last 5 days, and is new for me, never happend before.
Escrima Kernel, but like I said, I'm using the same Config like for 2 months.

Related

[Q] X10i upgrade R2BA026 restarts abruptly

Hi,
I got an X10i from UK Vodafone, and upgraded its firmware in India through SEUS, and it was clean installation to R2BA026, but the moment I started using it, every time I use some app the phone switches off. Its very inconsistent.
I tried below with no luck
reinstall
removed some apps
Killed some apps
I worried that many in talk.sonyericsson.com/message/10001 say that its hardware issue, but I dont think so.
Can anyone help with some solutions?
Mod's please move this if this is not the right place to post this.
Have you tried to OTA update your x10? If this won't work you may should root your phone or try to downgrade it to an older firmware!
SE will launch eclair soon, this will also fix phone!!!
I got exactly the same here. Phone reboots in a loop or even crash without a reason. Sometimes it couldn't come up, while activating SIM / phone. After that message appears the phone is still in loop and reboots again.
I am going to downgrade now to 024 firmware. It's driving me crazy...will post if I have luck.
Well I figured out, that the problems we have are a bit more strange as expected. I read that the problem is because of the overheated battery. Once happend, the battery isn't working properly anymore. So only SE Customer Service can help. Today I'm going to a Sony store to explain my problem with the phone. Hope I'll have luck.
I nearly forgot to post the details: http://talk.sonyericsson.com/message/12816#12816
I got the same problem and tried everything to fix it but nothing helped. As soon as mobile switches on it restarts and goes into a boot cycle.
I figured out that the mobile restarts mainly when it needs to read something from the sim card. I swapped my old sim with a new sim and found that the restart problem was solved instantly. I tried again with another bad sim and the restart loop starts again.
Bad sim cards slide into the sim card slot very easily and hence the pins connection are loose which tends to make the mobile unstable while reading or writing from/to sim.
The easy method to solve this problem is by making the sim a little thick by sticking a piece of paper on the back side of sim.
From my personal experience bad sim is main cause of restart cycle.
Try to swap sim cards, if it works let us know.
Thanks
Hi,
Thanks for the details.
I tried both the sim cards, I have GSM Vodafone, and BSNL 3G, both has the problem, very similar.
The same worked earlier with R1XXXX very well.
However, will try the Sim trick with a paper on the back side, which afix the sim tightly.
Thanks,
Naveen.KK
Hi,
I have tried the sim trick with no luck.
Some one help.
Thanks,
Naveen.KK
its not related to sim or firmware
it is not related to sim or software, it might me with some handsets but it is completely a hardware problem...dont believe me use your phone without sim and memory card and play some game or just keep on playing with your phone
it will turn off and you have to remove battery for few seconds otherwise it wont start
this topic is covered on sony site mentioned above and other threads, this is not just happening to me or some of us...its with many of us
changing firmware, sim , memory card tried everything no luck
m using iphone now and miss big x10 screen and better colors
One week ago I sent my phone to SE. I'll get a report with my X10 back. So till now I don't have heard nothing from SE. I'll tell you what's in the report, if I get it back. By now I am playing with my oldschool N80 :-(
Hi I observed one thing weird here.
I have reset the mobile, and when it asked for APN settings, i disabled MMS&data, phone seems to be working little stable, goto check for some time, and try playing games on it.
Thanks,
Naveen.KK
naveen.kk said:
Hi I observed one thing weird here.
I have reset the mobile, and when it asked for APN settings, i disabled MMS&data, phone seems to be working little stable, goto check for some time, and try playing games on it.
Thanks,
Naveen.KK
Click to expand...
Click to collapse
The MMS and Data settings seem to be the problem.
When I used my old sim which was disabled, it worked fine with everything. When I enable my APN and MMS settings in my new sim and start browsing the net and downloading stuff it restarts there.
I think the problem is somewhat related to internet browsing on mobile.
What app do you use to browse internet on your Xperia?

How to fix no SIM card error after rom installation.

Ok u flashed a rom and have No SIM inserted or no service or that kind of error.I found this fix trying out things for myself.Take out your SIM card ,turn on airplane mode,reinsert it and turn off your phone(not reboot but power off).Wait for 1 minute and power it back on.Tada!Should be fixed!:fingers-crossed:
Thank you!
Thank you so much! I was worried I was going to have to try one of the more complicated fixes I've seen here. I was puzzled because after performing Joseph230's procedure to root and "convert" an S4 from AT&T to T-Mobile (http://forum.xda-developers.com/galaxy-s4-att/general/convert-i337-to-m919-wifi-caling-t2896719) everything seemed fine and I reinstalled all my apps. Then, I get the "No SIM inserted" error out of nowhere!
After much researching I was losing hope of finding a fix guaranteed to work. Then I found your post and it worked like a charm! :highfive:
robermaldo
Thank You
Im so glad that this worked because I was losing hope that my imei or something was broken and I git scared then I found this and it actually worked I thought it was because 5.1.1 or something anyways thanks for the help I actually loged in my XDA account just to post that cause I just always use the browser
A coworker brought me his G2 that I have taken apart to fix many times before because it was having problems charging and turning on (black screen; rhythmic buzz from the vibration motor). I worked around that to get it booted temporarily but then the SIM connection seemed to suddenly fail. I replaced the motherboard entirely because some charge/power issues persisted and everything works perfectly EXCEPT that the replacement also doesn't see the SIM. Both are running stock LG Verizon Lollipop (assumed installed by OTA). No one was playing around with alternate ROMs or anything. None of the fixes in this thread help. The SIM slot is on the board so I hesitate to assume that the charge, mic, headphone flex PCB has something to do with it, but it is the only major common component (even replaced the screen again along with the battery, speaker, etc while leaving out useless components). Any suggestions?
Long version:
After a previous screen replacement it would only buzz when attempting to turn on or buzz repeatedly when attempting to charge until I loosened the black screw near the battery connector. I definitely narrowed it down to that particular screw, though I still couldn't say why (the previous tech who replaced the screen may have shorted the battery terminal near there). When he brought it back to me it was doing the same thing again even with the screw completely removed. Within minutes I had it booting just by poking around. Not sure what I did but I had to take it apart and poke around again to get it to come on after making the mistake of turning it off (went right back to buzzing). I'm pretty sure that the SIM card worked because he received a couple text messages when I first got it turned on (phone hadn't been booted in a day). After getting it to turn on I had to leave it on while reassembling, so I put the SIM tray back in when I was done. The owner was watching and asked why the status bar showed an "X" on the signal strength, so I told him that it was because you had to reboot after reinserting a SIM on most Android devices (as opposed to dual-SIM and iPhone devices). Though I couldn't turn off without causing the power problem, I could safely restart. Unfortunately, restarting only gave me the "Insert SIM" message at boot and nothing I could do would get it to see the inserted SIM. I tried many SIM cards but none worked. I replaced the motherboard expecting it to be a solution to both problems but only the power problems went away. The SIM card issue remained even though the SIM slot is built into the part I replaced and the part I purchased is supposed to be guaranteed, tested, clean IMEI, etc. I'm at a loss. I've taken out every unrelated component and replaced the screen again and replaced the battery so about the only thing that is common is the flex PCB with the mic, headphone jack, display connectors, etc running through it. Not sure how that could be a factor, but I'm replacing it too. In the mean time, does anyone have any suggestions for what could be wrong?
Update: A new mic/USB/headphone flex PCB fixed it. I'm not sure how that can cause the SIM card to not be detected, but I conclusively tested and that was definitely the problematic component: No SIM card detected on either motherboard with the old flex PCB, SIM card detected fine on both motherboards with the replacement flex PCB.
hackarchive said:
Ok u flashed a rom and have No SIM inserted or no service or that kind of error.I found this fix trying out things for myself.Take out your SIM card ,turn on airplane mode,reinsert it and turn off your phone(not reboot but power off).Wait for 1 minute and power it back on.Tada!Should be fixed!:fingers-crossed:
Click to expand...
Click to collapse
thanks bro fixed d801
This solution is great! Thanks for sharing!!!
Thnx a lot ! worked ..
CZroe said:
Update: A new mic/USB/headphone flex PCB fixed it. I'm not sure how that can cause the SIM card to not be detected, but I conclusively tested and that was definitely the problematic component: No SIM card detected on either motherboard with the old flex PCB, SIM card detected fine on both motherboards with the replacement flex PCB.
Click to expand...
Click to collapse
Hello, is your LG G2 still working with the new PCB flex?
Thanks a lot, this solution worked for me ?
i've done flash rom on Mtv Slash 3G 512 RAM Tablet, but no sim detected ....& i've followed your suggestion but no solution made...!!!
I had spent more than one month using CM13 based ROM thinking its ROM based issue. but this resolved the issue.
But now no sim issue has been resolved yet no mobile signals are working...
I have a vs980 or the Verizon lg g2. It bought it unlocked and I use T-Mobile. The data worked when I was on the stock os. I then got cm13 and everything worked good accept it wouldnt see my sim card or it would say no signal. And it had no info on the sim card in the about phone settings. So I tried a few other nightlys and nothing worked. I went down to cm12 and still I got the same error. I tried what you said here multiple times and it doesn't seem to help. Any help would be greatly appreciated. Thanks
Trystar360 said:
I have a vs980 or the Verizon lg g2. It bought it unlocked and I use T-Mobile. The data worked when I was on the stock os. I then got cm13 and everything worked good accept it wouldnt see my sim card or it would say no signal. And it had no info on the sim card in the about phone settings. So I tried a few other nightlys and nothing worked. I went down to cm12 and still I got the same error. I tried what you said here multiple times and it doesn't seem to help. Any help would be greatly appreciated. Thanks
Click to expand...
Click to collapse
I found a fix! Go into settings and select Mobile networks. When your in there there should be a "preferred network type" change that to global and there you go. Now I couldn't get that to work on cm13 because the settings would crash when you try to go into mobile networks. But I got it to work on cm12 just fine
dear sir. I have samsung galaxy grand duos i9082. i have installed custom rom 5.1.1 but after booting with new custom rom no sim card is coming. i have seen your valuable method and done as u said but it is not working on my phone. i have tried two to three time but no. i don't know how to fix it. Sir I have tried all custom rom cm12,cm13, 600, 4.4.4. but in all custom rom i found no sim card. i dont know what to do?
How you can remove SIM without battery?
But I can't take my SIM OUT WITHOUT TAKING OUT THE BATTERY!!
hackarchive said:
Ok u flashed a rom and have No SIM inserted or no service or that kind of error.I found this fix trying out things for myself.Take out your SIM card ,turn on airplane mode,reinsert it and turn off your phone(not reboot but power off).Wait for 1 minute and power it back on.Tada!Should be fixed!:fingers-crossed:
Click to expand...
Click to collapse
I have a galaxy note 3 -n900 I flashed CM13 after which my phone keeps saying SIM removed/inserted... And I can't remove my SIM without taking out my battery. Also my IEMI no. is correct. So no problem there
THANKS!!!
I've spent the last three weeks dealing with various radio bugs and issues, clearing preferences, wiping caches, factory resetting, and installing clean ROMs. All it took is to set the thing into airplane mode? You've got to be kidding me!
Thanks a lot for the solution hackarchive! :good::good::good:
hackarchive said:
Ok u flashed a rom and have No SIM inserted or no service or that kind of error.I found this fix trying out things for myself.Take out your SIM card ,turn on airplane mode,reinsert it and turn off your phone(not reboot but power off).Wait for 1 minute and power it back on.Tada!Should be fixed!:fingers-crossed:
Click to expand...
Click to collapse
hey bro i have LG G Pro 2 and i am facing this problem right now.
I cant remove sim without removing battery.
So please help me here.
sim no detection on leeco le2
Your solution not working on my leeco le2 . please suggested me another solution.

3G sim slot stopped working. Only works on 2G slot.

Hi guys!
Hopefully someone here may be able to help.
Recently got a Honor 7 and has been working great, about two days ago I stopped being able to make calls and use data.
E.G. it recognises that I have an 02 sim, then switches to emergency calls only but wouldn't even let me call 999.
The 2G slot works absolutely fine. I cannot find anything on-line with regards to this issue (no fixes anyway).
Its not a major issue as I can at least still make calls and these days there is WiFi everywhere but wouldn't mind getting my 4G back or at least finding out what has caused this issue.
Would be so grateful if someone could point me in the right direction as I am completely stumped.
Tried a factory reset, no luck. Was thinking of completely re flashing the OS onto the phone and starting from scratch but not entirely sure if its worth it.
Thanks guys!
cmillsyblud said:
Hi guys!
Hopefully someone here may be able to help.
Recently got a Honor 7 and has been working great, about two days ago I stopped being able to make calls and use data.
E.G. it recognises that I have an 02 sim, then switches to emergency calls only but wouldn't even let me call 999.
The 2G slot works absolutely fine. I cannot find anything on-line with regards to this issue (no fixes anyway).
Its not a major issue as I can at least still make calls and these days there is WiFi everywhere but wouldn't mind getting my 4G back or at least finding out what has caused this issue.
Would be so grateful if someone could point me in the right direction as I am completely stumped.
Tried a factory reset, no luck. Was thinking of completely re flashing the OS onto the phone and starting from scratch but not entirely sure if its worth it.
Thanks guys!
Click to expand...
Click to collapse
I have a same problem, but the device work in 3G only... I have tried a lot of things to solve the problem, but no way... For this reason I changed the Honor 7 with the last H7 Premium.
alexdexte said:
I have a same problem, but the device work in 3G only... I have tried a lot of things to solve the problem, but no way... For this reason I changed the Honor 7 with the last H7 Premium.
Click to expand...
Click to collapse
I would definitely be calling your service provider...sounds like tower issues or may even be a faulty or corrupted sim card.
Tmobilefan906 said:
I would definitely be calling your service provider...sounds like tower issues or may even be a faulty or corrupted sim card.
Click to expand...
Click to collapse
No, unfortunately it is a device problem, Honor service answered me that it is an hardware problem, but I can wait for repair it, so I have got a new H7 Premium and the hold now is the new device of my wife, she doesn't need 4G, by the way if I choose 2/3/4 G the phone if is in 4G often don't have connection, so I put it only in 2/3 G and work fine...
So u got it repaired ?
Sent from my KIW-L22 using Tapatalk

Simcard lost connection (had to re-enter sim pin)

Yesterday I received my Mi10, what a beautiful device. But I ran into a problem today:
While I was navigating in Google Maps my phone suddenly switched to lockscreen and I had to re-enter my sim pin. Like I was doing a hot swap. Only then did the phone reconnect to the network. This has happened once but I've never had this with another phone before. The sim card is new, clean and carefully inserted.
I hope this was a software bug and not a hardware issue...do you guys recommend requesting a device swap (other mi10) already? Is this a know problem?
Happend to me today also , when i did start my phone after recharge might be a software bug
I bought MI10 three days ago and this morning it lost the SIM connection and there is no way for making it recognized by MI10.
The same SIM works fine on my old MI6 and no other SIM works on MI10.
I have also tried to hard reset it, but nothing changes.
Do you think it is a hardware problem? After 3 days?
I have same problem, mi Mi 10 isn't reading my sim card anymore, looks like HW problem because it is sometimes working but I have to try to insert it maybe 30 or more times
And from today it is not reading sim card anymore.

[SOLVED] Cellular Problem with Redmi Note 9S

Solution: Disable "Dual 4G" option in the "SIM Cards & Mobile networks" settings
Hello, good day!
tl;dr: Phone stuck to no cellular signal, until I reboot, restart mobile radio power, or turning on airplane mode for a short while when turning off again.
---------------------------------------------------
I recently bought this phone as an upgrade to my old one. I transferred my sim, and all seems to be working pretty well. I lived in an area with very poor signal reception, so overnight, the phone doesn't have any signal reception other than WiFi.
The problem is that it remains that way (stuck on 'no signal') if it cannot get any signal for an extended period. The problem persists even if I went to an area with good cellular reception even in the city.
The problem seems to fix itself when I placed the phone either by activating airplane mode for a minute, turn off "mobile radio power" then back on again, or reboot my phone but it starts to get annoying over time.
I tried changing the preferred network type to the one my old phone used (LTE/CDMA auto (PRL)) to fix it, but no luck.
Does anyone know a permanent solution to this?
Default reset whit the SIM Putin and airplane oon
weedxlife said:
Default reset whit the SIM Putin and airplane oon
Click to expand...
Click to collapse
Hello,
By default reset, you mean a factory reset or a SIM card reset?
Factory reset bro. But if you don't. Try yet this option of SIM reset try it
weedxlife said:
Factory reset bro. But if you don't. Try yet this option of SIM reset try it
Click to expand...
Click to collapse
I tried the SIM Reset first and so far it is working perfectly but I need to monitor it first to check if the problem would persist in the long term.
Will update thread on the result.
================
Update: unfortunately, the SIM reset doesn't work. However, I tried swapping the SIM card to see if it makes any difference and surprisingly it did. I put in a SIM in slot 1 from a network with a good signal reception while my previous one on slot 2.
I would like to also note that the current SIM 1 has a successful Xiaomi activation & verified to use the chat features on the Messaging app while the old one does not.
All seems to work perfectly - but need further monitoring I can call it solved. Will update the thread on the result :good:
Update 2: The workaround above doesn't work. I sent to Xiaomi this issue.
laconix00 said:
I tried the SIM Reset first and so far it is working perfectly but I need to monitor it first to check if the problem would persist in the long term.
Will update thread on the result.
================
Update: unfortunately, the SIM reset doesn't work. However, I tried swapping the SIM card to see if it makes any difference and surprisingly it did. I put in a SIM in slot 1 from a network with a good signal reception while my previous one on slot 2.
I would like to also note that the current SIM 1 has a successful Xiaomi activation & verified to use the chat features on the Messaging app while the old one does not.
All seems to work perfectly - but need further monitoring I can call it solved. Will update the thread on the result :good:
Click to expand...
Click to collapse
My sim is in slot 1. still dropped calls. Seems like network disconnects and reconnects.
When call is dropped I immediately redial and sometimes no network.
Hi i have the same issue No signal, is there any tricks or tips or tools to fix this?
williamsonoma said:
My sim is in slot 1. still dropped calls. Seems like network disconnects and reconnects.
When call is dropped I immediately redial and sometimes no network.
Click to expand...
Click to collapse
Unfortunately, the workaround I posted doesn't seem to work also when my current SIM 1 can't pickup signal for at least 2-3 hours.
Yes I also experienced drop calls most notably when the signal drops below 0 bars (not no signal with an "X").
I can't find a good rationale a factory reset would solve the problem since nothing on my phone (modified settings, modded, or downloaded apps) that can affect the cellular network. So, I won't be taking that road for now.
I already sent feedback on Xiaomi and advice me to send the log files *fingers crossed*
Any updates..?
My father is experiencing similar experience with calls hang and even bad call quality, while pocophone f1 on the same network works flawlessly.
Data problem
I have a problem with my RedMi Note 9 Pro, when I make a call on 4G Airtel network(at least 4 bars) the data connection drops to an average g of 1.2kbps.
I have used the same Sim in the same area in my previous phone the Honor 9 Lite but it doesn't face any problem. Whenever I get a call on that phone the 4G data speed increases.
On the RedMi note 9 pro the data gets completely disconnected and even after I cut the call the data remains disconnected for 2 minutes or so. After that I resumes back. It even gets lesser speeds that my previous phone.
Sometimes the data drops without any reason. It stays disconnected for a minute or so and then tries to connect back. It has got horrible ping.
Anyone facing the same issues?
Having the same issue here. I modified phone settings several times and try with another apps but nothing working so far
I MAY HAVE FINALLY FIGURED OUT A POSSIBLE SOLUTION!
Disable "Dual 4G" option in the settings.
No issue so far for 3 days now

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