Database Users

[Q] How to use GSM SIM on Samsung Galaxy S 4 (Sprint SPH-L720) with 4.4.2 ROM?

Hi, I'm using the phone on GSM network outside the US, it had no problem when on 4.3.
After installing the 4.4.2 ROM (it is Sac's custom ROM based on official 4.4.2) I find it does not work with GSM SIM. There is no APN setting available, mobile network has no GSM option either.
Is there some hidden trick to re-enable GSM support on 4.4? Thank you.

[Q] Wifi Calling on L720

I know that the L720T (triband) has been enabled with the newest update, but is there any word on when / if WiFi calling will be enabled for the 1st gen L720?
What exactly does the WiFi Calling enable? Is it just adding SIP, or is it more?
If Sprint doesn't release a new firmware for the L720 is it possible to port the WiFi Calling feature from the L720T to the L720?

[Q] Use VZW Note 3 with T-Mobile WiFi Calling

I am not very experienced with flashing roms, but I was curious as to whether flashing a T-Mobile (Note 3) rom would destroy my phone (VZW Note 3) or allow me to achieve my goal of enabling T-Mobile's WiFi Calling feature. Any help is greatly appreciated!
Edit: I have the newest lollipop 5.0 update installed

No LTE on my OP2 with custom ROMs

Hey everyone. I have installed multiple custom ROMS on my phone including unofficial temasek and xperia cm 12.1 razor ROM and all of them end up with an exclamation point next to my cellular signal. Stock I have to issues with only custom ROMs. I made sure AT&T APN was correct and the preferred network was LTE. I know I have LTE signal because if I install stock it works fine. Any suggestions?

have you tried manually registering on att lte through cellular network setting?

No LTE after remote support from Oneplus Team
Guys,
I am new to this forum, so pardon if I made any mistake in posting.
Well, I have recently undergone a remote support session from oneplus team, during which I they have flashed my device with an special software (it was done to address broken fingerprint sensor repair). But unluckily I ended up with no LTE on my phone.
I was using same phone with network provide in the same area on LTE prior to that session, but later on my device no more work on LTE. Kindly help me resolving this issue.
I have tried putting my SIM in other phone, LTE works there, (other phone is Oneplus X, and in same area).
I have tried putting in other sim of same network but still no luck.
I have tried putting in a different network sim card in my phone and it works on LTE.
My understanding is, the the current ROM has locked the band which I was using earlier for LTE. Kindly advise.

Extract CSC and flash in custom ROM

Hello
T-Mobile USA released nougat and I want to use volte and wifi calling. I've tried extracting the csc and flashing it along with my rom which uses aroma installer but it causes constant com.android.phone has closed errors. I'm trying to use renovate rom.
I have the 935F model.

xgm541 said:
Hello
T-Mobile USA released nougat and I want to use volte and wifi calling. I've tried extracting the csc and flashing it along with my rom which uses aroma installer but it causes constant com.android.phone has closed errors. I'm trying to use renovate rom.
I have the 935F model.
Click to expand...
Click to collapse
Here is a custom Rom which has t-mobile Wi-Fi calling and volte built-in.
https://forum.xda-developers.com/s7-edge/development/rom-nougat-7-dplt-wifi-calling-volte-t3540723
You must be on the mobile network in USA or tmobile network in Europe and you must be using a T-Mobile sim card for Wi-Fi calling and volte to work.
Good luck, have a great day.