Database Users

[Q] AT&T LG G2 unlocked to use on T-Mobile Carrier Rom/Root Questions

Hey Guys,
So, I bought a AT&T LG G2 phone (I had a gift card at Best Buy- they don't carry T-Mobile). I heard that AT&T had the same towers so it's easier to work with an unlocked phone through them, so I bought it there instead from T-Mobile itself.
However, now I realized I don't have some of the features I would have on a T-mobile LG G2, such as my wifi calling, etc. Now, since the phone is unlocked (and I just got it rooted), would installing a T-Mobile rom affect my phone in any way, good or bad? Should I only use AT&T roms? How would I use T-mobile app services?
I searched google for 2 days and couldn't find anything relevant to my question. I've used this site a lot in the past year-two for rooting and such. Thank you guys in advance for continuing to support open development for android.

Wondering the same, about to switch to tmobile.

*Answer solved through own testing
trh1341 said:
Wondering the same, about to switch to tmobile.
Click to expand...
Click to collapse
Well, seems like no one has an answer to it...
Anyway, I went ahead and bought the phone. Since I do a lot of testing and rooting myself, this was the first time working on this type. I'm glad you posted, because I would have just forgotten about it now that I've solved the question I had... However, I figure it'd help in the future in case someone is also wondering the same.
Now, with that all stated... down to the answer.
If you bought an AT&T phone, and do an unlock code to use it on another carrier (such as T-mobile since they use the same towers), the rom you MUST use are the AT&T roms... NOT the T-mobile roms. The problem is, when you buy a AT&T phone, unlock it, and root your device to use another rom, it will not be compatible with T-Mobile roms because of the image files, etc. So yes- you will be losing all the features a T-Mobile rom would have such as wi-fi calling, etc...
However, a way to go about this (and it won't work with ALL the features that comes in a T-Mobile phone/rom), is to install a AT&T rom of your choice without all the crappy AT&T bloatware that you can't even use, and go to the T-Mobile section to look for an APK version of the files. Most of the time, T-Mobile roms will also remove the bloatware, however, some developers are kind enough to provide the bloatware APK files in case users would like to have certain one of them features, such as WiFi Calling.
So, that's how I did it, and it's working good.
PS- One last thing, you may have trouble going on the internet or playstore when you're unlocked to a different carrier. All you need to do is find the APN settings for your carrier. So in this case, I bought an AT&T phone, bought unlock code to use on my carrier T-Mobile, and got the T-Mobile APN settings set up, reboot, and I get all my 4G data, etc. You can get this by calling T-Mobile. Just say, you bought an unlocked phone and can't access data, internet, etc, and was told to set up a APN. Or, you can use google. :good:
Hope I helped everyone else out there!!

johnnyjrmoua said:
Hope I helped everyone else out there!!
Click to expand...
Click to collapse
So, would I be correct in stating that you will only get 4G in areas where it is offered @ 1900 MHz? What about 2100 MHz? Otherwise you will only get 3G HSPA+? As you can tell I'm a bit confused about compatibility between networks. According to wikipedia they will be doing away with 1900 MHz 4G by 2015. I'm trying to decide if it's worth buying an AT&T or Verizon phone to use on the T-Mobile pre-paid network because it seems the T-Mobile phones are not getting very much development.

johnnyjrmoua said:
Well, seems like no one has an answer to it...
Anyway, I went ahead and bought the phone. Since I do a lot of testing and rooting myself, this was the first time working on this type. I'm glad you posted, because I would have just forgotten about it now that I've solved the question I had... However, I figure it'd help in the future in case someone is also wondering the same.
Now, with that all stated... down to the answer.
If you bought an AT&T phone, and do an unlock code to use it on another carrier (such as T-mobile since they use the same towers), the rom you MUST use are the AT&T roms... NOT the T-mobile roms. The problem is, when you buy a AT&T phone, unlock it, and root your device to use another rom, it will not be compatible with T-Mobile roms because of the image files, etc. So yes- you will be losing all the features a T-Mobile rom would have such as wi-fi calling, etc...
However, a way to go about this (and it won't work with ALL the features that comes in a T-Mobile phone/rom), is to install a AT&T rom of your choice without all the crappy AT&T bloatware that you can't even use, and go to the T-Mobile section to look for an APK version of the files. Most of the time, T-Mobile roms will also remove the bloatware, however, some developers are kind enough to provide the bloatware APK files in case users would like to have certain one of them features, such as WiFi Calling.
So, that's how I did it, and it's working good.
PS- One last thing, you may have trouble going on the internet or playstore when you're unlocked to a different carrier. All you need to do is find the APN settings for your carrier. So in this case, I bought an AT&T phone, bought unlock code to use on my carrier T-Mobile, and got the T-Mobile APN settings set up, reboot, and I get all my 4G data, etc. You can get this by calling T-Mobile. Just say, you bought an unlocked phone and can't access data, internet, etc, and was told to set up a APN. Or, you can use google. :good:
Hope I helped everyone else out there!!
Click to expand...
Click to collapse
hey johnny, so you were able to get wifi calling feature on at&t branded lg g2 unlocked?

AT&T phone switch to T mobile Wifi calling do not work
trh1341 said:
Wondering the same, about to switch to tmobile.
Click to expand...
Click to collapse
Bought phone from ebay, it is an AT&T phone unlocked and want to use for T-mobile./ With T-mobile network I have to use wifi calling features in order to use in the house.
Could you please explain me how and how much it cost to get wifi calling feature in LG G2 ?

[Q] Installing a stock rom on a verizon UNLOCKED s5

Hi everyone!
So during my trip in the US, I decided to buy a brand new Galaxy S5. I was going to use it outside US so I wanted an unlocked version (since they don't sell international versions in us)
So I got a verizon version of the S5.
Model: SM-G900V
The problem
The problem is that i am getting notifications like. Non Verizon sim inserted. Loads of verizon bloatware. and I cant use my mobile hotspot. Similar to this
I absolutely hate this. I paid $800 for this phone and I'm bombarded with verizon's nonsense and restricted for no reason
My question
The question is, can I install a stock rom on my S5? more specifically can I flash the SM-G900f ?? So that I can get rid of this custom verizon software.

vidhu1911 said:
The question is, can I install a stock rom on my S5? more specifically can I flash the SM-G900f ?? So that I can get rid of this custom verizon software.
Click to expand...
Click to collapse
Well it's complicated and you have some reading to do if you really want to understand your options. But broadly speaking, the answer is yes. Since you were (or are?) planning to use the phone elsewhere, you'd have been happier had you bought a different S5 variant e.g. a TMobile S5 rather than the Verizon one because you would find it a lot less restrictive, give you more choices and options. And even access to a larger palette of frequency bands should you end up roaming somewhere that uses unusual frequency bands.
Note that there is a dedicated Verizon S5 forum here where you'll find most of what you are looking for. What you are thinking of as a stock ROM would be more accurately called a custom ROM. A stock ROM is.. well what you currently have, with all of the included carrier /Verizon applications that are annoying you. You'll probably want to root your phone and flash a custom ROM to get rid of a lot of superfluous Verizon stuff. That may have warranty implications and you should do some reading about warranty and locked bootloaders (something extra nice that Verizon and ATT do to make it harder to flash your phone).
.

[Q] AT&T over Verizon

So my question is quite simple, and before I get flamed, yes I have tried searching. I don't think I'm typing the correct sequence of words if there is already something on this. I never post obviously, I normally creep and derive my answers that way. Obvious again that I've been here since 2012
My question is if there is a way / guide to overwrite/reprogram the phone with the AT&T firmware and software and replace the Verizon that is currently on the device. I brought the phone over from Verizon to AT&T and there are just a couple complications that are just a bother and Just over it.
I would appreciate any guidance and information any of you could provide on the subject.

RonniEdwards said:
So my question is quite simple, and before I get flamed, yes I have tried searching. I don't think I'm typing the correct sequence of words if there is already something on this. I never post obviously, I normally creep and derive my answers that way. Obvious again that I've been here since 2012
My question is if there is a way / guide to overwrite/reprogram the phone with the AT&T firmware and software and replace the Verizon that is currently on the device. I brought the phone over from Verizon to AT&T and there are just a couple complications that are just a bother and Just over it.
I would appreciate any guidance and information any of you could provide on the subject.
Click to expand...
Click to collapse
I don't know if you can from a user stand point but when I was shopping around t-mobile store told me they would copy their firmware onto the phone so I could try their network. You may need to go to a store and talk to someone.

Since Verizon is CDMA and AT&T is GSM, I am not sure a simple firmware update is all that is needed to switch.

supersnackbar said:
Since Verizon is CDMA and AT&T is GSM, I am not sure a simple firmware update is all that is needed to switch.
Click to expand...
Click to collapse
That's what I thought but they insisted they could do it. Maybe since there is a Sim slot it's easier on the the 3's.

Years ago you could almost swap sim cards and be good. Idk about it anymore. I think you would have to take all the system files/partitions and the radio and swap them for the carriers. Im sure someone else whos more, but i think it would be unreasonably hard to do.
Sent From My Galaxy Note 3

This thread is moving to T-Mobile, but the concept is the same for AT&T
http://forum.xda-developers.com/showthread.php?t=2582747
Sent from my Note 3 via Tapatalk

i believe that some services would work as the phone has some radios in it for the att bands, but you would be better off trading for an att version. swappa has stuff like that all the time to straight trade

Getting service to work and getting 4Glte was no issue. That just required me to manually input APNs that were AT&T specific and presto I have service and all that jazz. My issue is a couple of other small things that really aren't big hut just thst, annoying. That's why I was seeing about the software and firmware being flashed into the device.

New SM-g935fd owner in USA confused

I caveat by saying the forum would not let me post anywhere but the general forum right now so that's why I'm posting here.
I've read a bunch of conflicting threads and info lately but nothing concise in regards to what I'm trying to do and need some help.
This is my first ever android phone. I'm coming from an iPhone 6 as a heavy business user. WiFi Calling is extremely important because my house has terrible cell reception. I recently purchased an SM-G935FD (duos phone) and I'm a USA AT&T customer. I rooted the phone day one but had not yet swapped the SIM card. I chose the DUOs because I do quite a bit of international travel and I liked the hardware of the XYNOS platform better than snapdragon. Unfortunately I didn't realize or suspect that WiFI calling would potentially become a problem. I could care less about Samsung or Apple Pay for that matter, nor do I really care about Voltos. But wifi calling is a deal breaker.
I rooted the phone, and I put flash fire on there but really don't know how to use it. I found some people saying that my phone can accept both the SM-G935F firmwares and FD firmwares, but others who were skeptical. And people saying that there were firmwares that did have wifi calling enabled and others who said no.
At the moment I am back on the iPhone 6 because the Samsung is useless to me until I figure out how to get wifi calling enabled on there.
So... I'm confused. IS there a firmware I can flash my rooted unlocked S7 that will enable this? How exactly do I go about doing that with either flash fire or smart switch? I looked, but I am having difficulty finding a guide on doing this. The phone is already a paperweight, but I don't want to brick it as well lol.
Thanks for the help.

Usaf-lt-g said:
I caveat by saying the forum would not let me post anywhere but the general forum right now so that's why I'm posting here.
I've read a bunch of conflicting threads and info lately but nothing concise in regards to what I'm trying to do and need some help.
This is my first ever android phone. I'm coming from an iPhone 6 as a heavy business user. WiFi Calling is extremely important because my house has terrible cell reception. I recently purchased an SM-G935FD (duos phone) and I'm a USA AT&T customer. I rooted the phone day one but had not yet swapped the SIM card. I chose the DUOs because I do quite a bit of international travel and I liked the hardware of the XYNOS platform better than snapdragon. Unfortunately I didn't realize or suspect that WiFI calling would potentially become a problem. I could care less about Samsung or Apple Pay for that matter, nor do I really care about Voltos. But wifi calling is a deal breaker.
I rooted the phone, and I put flash fire on there but really don't know how to use it. I found some people saying that my phone can accept both the SM-G935F firmwares and FD firmwares, but others who were skeptical. And people saying that there were firmwares that did have wifi calling enabled and others who said no.
At the moment I am back on the iPhone 6 because the Samsung is useless to me until I figure out how to get wifi calling enabled on there.
So... I'm confused. IS there a firmware I can flash my rooted unlocked S7 that will enable this? How exactly do I go about doing that with either flash fire or smart switch? I looked, but I am having difficulty finding a guide on doing this. The phone is already a paperweight, but I don't want to brick it as well lol.
Thanks for the help.
Click to expand...
Click to collapse
u need to go read over the custom roms and recoverys forum for the s7 edge.

ecg803 said:
u need to go read over the custom roms and recoverys forum for the s7 edge.
Click to expand...
Click to collapse
Actually I think I got it figured out. I changed the CSC using TWRC over to an att USA CSC and that seems to have at least enabled the menus for this functionality. I haven't moved the SIM back over there to test it though.
Sent from my iPhone using Tapatalk

I would move this thread to the AT&T specific section. My understanding is that specific drivers are needed to do WiFi calling on AT&T and it's not baked in and the model you bought is not sold in the states whether it's sim unlocked or not. Also, why would you root/jailbreak a phone running an OS that you have no real experience with? If you can't get it to work then I'd return it and either buy the AT&T version outright an have them unlock it for you or go to Best Buy, Amazon or Samsung themselves and buy the single sim unlocked version. You may still have issues with that unlocked version if AT&T's Wifi calling is as locked up as I remember. T-Mobiles wifi calling works with your handset but it also has oddities such as the TMO sim must be in sim slot 1 to work. Because that model is not normally used with U.S. carriers .. they kinda don't give a crap about it so the work is on you.
Since this is your first Android phone .. I don't want you to think this is a problem with the OS or even with Samsung. It's just how things work. Apple allows carrier specific network files to be pushed to iOS where that's not the case with Android. I think maybe backup and stop hacking on things would be a good piece of advice. Take it for what it is. I just would like to prevent another iOS switcher from running around saying Android suck because things didn't go the way they thought would.
Cheers.

aergern said:
I would move this thread to the AT&T specific section. My understanding is that specific drivers are needed to do WiFi calling on AT&T and it's not baked in and the model you bought is not sold in the states whether it's sim unlocked or not. Also, why would you root/jailbreak a phone running an OS that you have no real experience with? If you can't get it to work then I'd return it and either buy the AT&T version outright an have them unlock it for you or go to Best Buy, Amazon or Samsung themselves and buy the single sim unlocked version. You may still have issues with that unlocked version if AT&T's Wifi calling is as locked up as I remember. T-Mobiles wifi calling works with your handset but it also has oddities such as the TMO sim must be in sim slot 1 to work. Because that model is not normally used with U.S. carriers .. they kinda don't give a crap about it so the work is on you.
Since this is your first Android phone .. I don't want you to think this is a problem with the OS or even with Samsung. It's just how things work. Apple allows carrier specific network files to be pushed to iOS where that's not the case with Android. I think maybe backup and stop hacking on things would be a good piece of advice. Take it for what it is. I just would like to prevent another iOS switcher from running around saying Android suck because things didn't go the way they thought would.
Cheers.
Click to expand...
Click to collapse
Ok slow down. I don't think any of that at all regarding saying or
Thinking android sucks nor would I make such a conclusion. Lol. Also couldn't put the thread there, wouldn't let me create a thread over there (said im "too newb")
I'm a LONG time older comp sci major who works for a software company and has been doing consulting for a number of years. All day every day I deal with every software imaginable. It just HAPPENS that this is my first android phone, and Therefore is not that familiar to me yet. The only reason I had an iPhone and idevices (all jailbroken) in the first place was because at the time, my company was locked to Apple mobile devices. I'm actually simultaneously working with piemessage to try and get a VM up and running to allow me to use iMessage on Android
Also I understand their may be some nuisances of screwing with other packages and drivers. I did do the CSC update and that "enabled" at least the menus and the ability to turn the features On. Whether or not it's working, I have no idea. Without a SIN card inserted however, I was able to place a cal using google hangouts dialer without any issue whatsoever, but as that is a different app then the actual phone dialer... I'm not sure if that proves anything. Feel free to correct me if I'm wrong, but making a wifi cal through Hangouts Dialer connected to my google voice number without a SIM card inserted is different than dialing a number using the phone app.
Unfortunately, the only real way for me to test it, is to take the SIM back out of my iPhone, call att again and have them switch the IMEI again. At least google voice wouldn't configure properly until I did that and it took forever to get the call forwarding reset. And my problem is I'm going on a business trip tomorrow and don't have the time to be swapping SIM cards back and forth.
Maybe I'll just put it in letter without calling AT&T and see if it works anyways. Are there any prevalent icons up at the top to indicate it's a wifi call being made vs a cell call?
Sent from my iPhone using Tapatalk

Usaf-lt-g said:
Ok slow down. I don't think any of that at all regarding saying or
Thinking android sucks nor would I make such a conclusion. Lol. I'm a
LONG time older comp sci major who works for a software company and has been doing consulting for a number of years. All day every day I deal with every software imaginable. It just HAPPENS that this is my first android phone, and Therefore is not that familiar to me yet. The only reason I had an iPhone and idevices (all jailbroken) in the first place was because at the time, my company was locked to Apple mobile devices. I'm actually simultaneously working with piemessage to try and get a VM up and running to allow me to use iMessage on Android
Also I understand their may be some nuisances of screwing with other packages and drivers. I did do the CSC update and that "enabled" at least the menus and the ability to turn the features On. Whether or not it's working, I have no idea. Without a SIN card inserted however, I was able to place a cal using google hangouts dialer without any issue whatsoever, but as that is a different app then the actual phone dialer... I'm not sure if that proves anything. Feel free to correct me if I'm wrong, but making a wifi cal through Hangouts Dialer connected to my google voice number without a SIM card inserted is different than dialing a number using the phone app.
Unfortunately, the only real way for me to test it, is to take the SIM back out of my iPhone, call att again and have them switch the IMEI again. At least google voice wouldn't configure properly until I did that and it took forever to get the call forwarding reset. And my problem is I'm going on a business trip tomorrow and don't have the time to be swapping SIM cards back and forth.
Maybe I'll just put it in letter without calling AT&T and see if it works anyways. Are there any prevalent icons up at the top to indicate it's a wifi call being made vs a cell call?
Sent from my iPhone using Tapatalk
Click to expand...
Click to collapse
Yeah, ya never know what folks know.
I've just encountered a lot of folks who are smart techies who have used iPhones for a long time and Android frustrates them and then they freak out. My bad. I apologize.
I still think you need to check the AT&T specific section. I've read that the proper support for AT&T's wifi calling isn't baked into AOSP like T-Mobile has theirs baked in. This could have changed but I don't think so. The other calls ie. Hangouts, Google Voice and Skype aren't controlled by AT&T so I would assume they'd work regardless. The wifi calling registers with AT&T's servers/routers ... what they require for this handshake I'm not entirely sure. I know that when I tried it out using my Nexus 6P it didn't work out of the box but I didn't spend a lot of time on it either.
Ah. I get you about the business trip thing. It's why I bought the unlocked S7E .. I have to swap to often when traveling. I did this after I bought the version you have. I found that 1 sim slot would do LTE/3G/2G and the other was stuck on 2G only and that it would random switch from sim 1 to sim 2 when I was in the States with my personal TMO sim and my work AT&T simcard. It was too irritating so now I just expense the TMO account and gave back the AT&T sim. Not an option for everyone .. I get that.
Also, I did read that AT&T likes to jack folks around on speed when it's not one of their phones and there is a fix involving the EMEI number being changed in your account .. I can't remember where on XDA I found that trick but I'm sure a search will find it for you.
Hope you get it working. The S7E is a nice phone.
Safe travels. Cheers.

hey go check out sac23 rom it is USA att ported note 7 rom. It has wifi calling.

ecg803 said:
hey go check out sac23 rom it is USA att ported note 7 rom. It has wifi calling.
Click to expand...
Click to collapse
Good call. Just loaded it, will test wifi calling.
Sent from my iPhone using Tapatalk

What was your result? I'm in the same boat, thought this model would be useful for business trips. Also need Wi-Fi calling at home, but no dice.

Is an unlocked galaxy s8 worth it?

Hi all, i'm just recently joined this site
I just bought an unlocked galaxy s8 from Samsung website, but now i'm worried. I currently have AT&T and was planning on continuing to use my plan from them, but I was reading that things like Wi-fi calling don't work on unlocked phones with AT&T. Is this true? I was debating on returning the phone (haven't gotten it in the mail yet) and get an AT&T associated one, just because in my work building, there's quite a few dead zones where I don't get service and sending texts was always frustrating until i learned about the wifi calling feature on my current phone. I really don't want to have a brand new, amazing phone like the s8 and still struggle with text messages not going through.
I was reading around on here, that there might be a way to flash AT&T firmware onto my unlocked phone so I can get Wi-fi calling abilities, is this true? How could I go about doing that? I'm pretty inexperienced when it comes to messing with phone software like that (but I can follow directions easily), so would it be worth trying to figure out or am I better off just spending the extra money for the ATT specific phone? That one doesn't have the color I wanted either so it's a little bit of a bummer.
Thanks for any possible help

shaml96 said:
Hi all, i'm just recently joined this site
I just bought an unlocked galaxy s8 from Samsung website, but now i'm worried. I currently have AT&T and was planning on continuing to use my plan from them, but I was reading that things like Wi-fi calling don't work on unlocked phones with AT&T. Is this true? I was debating on returning the phone (haven't gotten it in the mail yet) and get an AT&T associated one, just because in my work building, there's quite a few dead zones where I don't get service and sending texts was always frustrating until i learned about the wifi calling feature on my current phone. I really don't want to have a brand new, amazing phone like the s8 and still struggle with text messages not going through.
I was reading around on here, that there might be a way to flash AT&T firmware onto my unlocked phone so I can get Wi-fi calling abilities, is this true? How could I go about doing that? I'm pretty inexperienced when it comes to messing with phone software like that (but I can follow directions easily), so would it be worth trying to figure out or am I better off just spending the extra money for the ATT specific phone? That one doesn't have the color I wanted either so it's a little bit of a bummer.
Thanks for any possible help
Click to expand...
Click to collapse
Read these treads, you will get an idea and if you decided to do it or have questions, then this is your go to guide:
https://forum.xda-developers.com/galaxy-s8/how-to/snap-guide-flashing-standard-fw-carrier-t3625817
https://forum.xda-developers.com/galaxy-s8/how-to/switch-to-carrier-firmware-100-t3609487

Basically u will not get wifi calling unless u supply ATT with a imei number from a legit wifi calling capable phone even with the flash. Since this seems to be of major importance to u I would get the ATT phone.
Sent from my SM-G950U1 using Tapatalk

unlocked carrier free model OTA updates have also been already palpably behind Verizon and T-Mobile.