Galaxy S6 Edge SM-G925F on T-Mobile USA and LTE/Data problems - Galaxy S6 Edge Q&A, Help & Troubleshooting

Hello. I have an SM-G925F which I bought from Telekom Macedonia and I am still using my number from there also but I am currently in the US and would like to use it on T-Mobile USA.
I know that the device supports all the same bands as the SM-G925T model.
The problem I am having is that when my phone is set to LTE/WCDMA/GSM in the Network Mode settings, I do not have any data connection at all, only when I make a call, I start to get a data connection but only 3G/H+. If I switch my setting to WCDMA/GSM, then I get a data connection at all times like normal but it still is only 3G/H+. I have tried two different APNs and different settings in the APN but I still cannot get a data connection at all times on the LTE/WCDMA/GSM setting and I cannot get LTE/4G at all.
After contacting T-Mobile, all they came up with is to try to have the same software reinstalled on my phone. Does anyone have any experience with this and can anyone help me?

Anyone?

Call Tmobile and have them input your phone's IMEI in their system. Ask for the APN settings as well. I am on the same boat and one call to ATT got me from H to 4G. Your phone will just show 4G, not LTE but you will get LTE speeds regardless.

I tried doing that too. I called T-Mobile a few times and they confirmed my IMEI number being on the account but still no luck. It's really weird..sometimes I get 3G/H+ on the "LTE/WCDMA/GSM (auto connect)" network mode setting on the phone but most of the time, I get NO DATA connection at all..only the signal bars.

Any Update
Did you finally figure it out? Is LTE working now?

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I have a problem with roaming.
I am on MTS who has joined with Rogers network.
On stock ROM: 2-6-35-7-i9100xwkf3-cl276555 rootdell101 #2
I go to the US
Phone works on roaming
Can receive SMS
Cannot send SMS - Send fails
I have since rooted and installed Alienware 2-6-35-11 ninphetamine 2.1.3 xxkh3
I go to the US
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can't send/receive SMS
when dialing get the Mobile network unavailable message
My wife's samsung galaxy S i897 works fine -
Swapping SIMs with her yields the same failures on my S2 with her SIM.
In both cases, crossing the border home fixes the problem and life is grand.
I have tried:
1.enabling data roaming
2.rebooting
3.battery pull
4.swapping sims
Is anyone else having similar roaming issues - is there a ROM that actually works while roaming from Canada while in the US?
I have seen problems on my old Galaxy S and my wife's similar to this as when trying different ROMS, but have never gone across the border with any of these ROMS installed.
What I've seen with different ROMS is:
1. sometimes cannot get phone to get on network unless I setup the APN settings first
2. sometimes cannot get phone or data to work without enabling roaming mode. The phone actually says it's roaming even when it's on the home network
Is there anything I'm missing in the forums on this issue?
Thanks for the help
hmm, maybe you've tried, but have you checked if the APN list is accurate ?
i believe there is an app to set the APN on the market ( can't remember the name though, never had the need for it.)
or try to google if you can find the APN setting of your network provider.
Seem like an APN problem to me as you explain it.
on the phone, you can access that with :
Settings >> Mobile networks >> Access Point Names and then the details of each APN can be checked/edited.

S6 Edge not finding 4G/LTE networks

S6 Edge on Three in UK not switching to 4G/LTE.
Network search fails to find any 4G networks despite all four networks being found by another phone.
S6 Edge Network mode is set to LTE/WCDMA/GSM (auto connect).
Any suggestions?
I can confirm my S6 Edge definitely finds Three 4G. Do you definitely have service? Which model and CSC?
apd said:
I can confirm my S6 Edge definitely finds Three 4G. Do you definitely have service? Which model and CSC?
Click to expand...
Click to collapse
Thank you.
Yes definitely had service. Tested it yesterday at multiple locations, with another phone alongside it. S6 Edge could connect to data at H & H+ rates but no 4G/LTE. A network scan revealed that it was not finding any 4G networks, yet same scan on other phone alongside it revealed 4G from Three, O2, Vodafone and EE.
It is set in the correct mode (LTE/WCDMA/GSM) but it seems that the phone is unaware of its LTE capability.
Does anyone know if there is a status screen or service screen that will show if the 4G/LTE bands are enabled?
SOLVED:
A quick wipe of the cache and the phone is now finding 4G/LTE networks.
MobileBritain said:
SOLVED:
A quick wipe of the cache and the phone is now finding 4G/LTE networks.
Click to expand...
Click to collapse
Just tried it and it is working thanks!
Please could you list the steps how you have wipe the cache?
I facing same issues
SOLVED - FYI I just reset network settings by going - apps/settings/backup&reset/reset network settings and restored these to default. 4g came back instantly. Hope this helps

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Has anyone confirmed that I would be able to use a US Cellular S6 Edge on Cricket. I have read quite a bit of info on the subject and it looks like all the CDMA versions of the phone have the appropriate band support, although I may have to root it and enable them in the service menu. Does this sound correct? Thanks for the help!!
I just bought one from eBay 2 days ago. It's a US celluar s6 edge and it's working on cricket for me. The only problem I have is that sometimes it won't let me send text messages. I have to switch airplane mode on then off and it will work. When I try to add the apn it will save but after about an hour it gets erased.
The only problem I had was not being able to text when it was on 4glte. I rooted it and set my network to wcdma preferred and now I don't have any issues. Texts, calling and data all work great

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Hey everyone
I have the Canadian variant of the LG G5 (the H831) and I have no LTE option in network mode.
I bought this phone from WIND Mobile (now Freedom Mobile) and it seems like they Disabled the LTE functionality for some reason.
I was wondering if there is a way to enabled it?
I inserted my SIM in my friends phone (same model but with Rogers Wireless) and the phone downloaded the APN settings from Freedom Mobile.
That did not work at all and the phone was stuck on 3G just like my phone.
I heard if I install the firmware from another provider, it might work. However it seems the APN settings from my provider are causing the LTE option to disappear from network mode.
Lastly, I accessed the service menu by dialing a code in the dialer and I was able to enable LTE.
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H961N Network Issue

My H961N does not allow me to independently set my network band for each sim card. Both my network providers operate on 2G/3G/4G however since I have gotten this V10 I have had inconsistent network usage. At first I would strongly get one network and the other would mostly be on Emergency Calls when indoors depending on where I was. I used the hidden menu code *#546368#*961#-> Field Test -> Modem Settings, from Modem Settins I have tried to set the RAT Selection and the Network Mode however when I check Engineering Mode both sims show the same band if I am on WCDMA Only or GSM Only but neither provider operators on the same band except for one on 3G. If RAT is set to selectively move between two or more frequencies then one sim shows Invalid Band in Engineering Mode. Using Network Mode I have tried to set each sim to different band but both would either show the same band or one would appear invalid under Engineering Mode.
Another Issue I have is I am unable to use data even though I have the correct APN for both of my Network Providers. I have verified that both sims do work when used in another phone, at one point I visited both Providers but none could give me an answer to my issue. One of my Providers did however try and activated a data plan while I was in their office and the V10 did show 3G and received data however upon returning back to my regular surroundings I no longer got any data. I have tried upgrading the V10 to Marshmallow and Nougat but the upgrade did not solve this problem, neither the one I stated before. But on Nougat both my sims did show 3G but strangely only when I have my Wifi active and using a VPN. Currently I am on Lollipop and rooted I considered trying to flashing a qcn, sec and nvm files since I saw a site listing them as fixing network and data issues on this particular phone, I have the files just in case. Any help would be greatly appreciated.

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