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[Q] Using an AT&T S4 with Verizon

Hey guys, I'm getting my hands on my friend's Galaxy S4. He is on an AT&T plan and got then phone from them through an upgrade. I personally prefer Verizon. I was wondering if I could get some help on making his phone work for me. I have a SIM card and everything, currently using a RAZR MAXX. I've done a little looking around, and from what I gathered, the phone is capable of working with verizon, but I'll have to load a different kernel and ROM onto it. I've looked through http://forum.xda-developers.com/showthread.php?t=2295557 that thread and found some nice info, but I'm not yet confident enough in my knowledge to go through with it. I've decided on the http://forum.xda-developers.com/showthread.php?t=2305781 CLEANROM 1.6.5, but I don't know what else I'm going to need to have in order to make this phone work for me. I also don't know if I'll need to download the Verizion or the AT&T version of this. Thanks for all the help, I'm really wanting to make this work for me so I can actually get a powerhouse of a phone.

Xray55 said:
Hey guys, I'm getting my hands on my friend's Galaxy S4. He is on an AT&T plan and got then phone from them through an upgrade. I personally prefer Verizon. I was wondering if I could get some help on making his phone work for me. I have a SIM card and everything, currently using a RAZR MAXX. I've done a little looking around, and from what I gathered, the phone is capable of working with verizon, but I'll have to load a different kernel and ROM onto it. I've looked through http://forum.xda-developers.com/showthread.php?t=2295557 that thread and found some nice info, but I'm not yet confident enough in my knowledge to go through with it. I've decided on the http://forum.xda-developers.com/showthread.php?t=2305781 CLEANROM 1.6.5, but I don't know what else I'm going to need to have in order to make this phone work for me. I also don't know if I'll need to download the Verizion or the AT&T version of this. Thanks for all the help, I'm really wanting to make this work for me so I can actually get a powerhouse of a phone.
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Nope. it won't work.

xuanphucn said:
Nope. it won't work.
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Is what I read about on the post I linked not true then?

Xray55 said:
Is what I read about on the post I linked not true then?
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Your link is to a thread regarding other variants of S4 roms. Although you can use other S4 roms on the i337, the phone wont work on verizon carrier.

Kaze105 said:
Your link is to a thread regarding other variants of S4 roms. Although you can use other S4 roms on the i337, the phone wont work on verizon carrier.
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I'm not sure about that. ROM shouldn't matter too much, you just have to have it SIM unlocked and I believe it won't work too well due to the different frequencies between carriers and so you may not get LTE or something. Maybe someone can correct me though.
Sent from my GT-I9505 using xda app-developers app

Verizon/Sprint phones use CDMA.
ATT/T-Mobile use GSM
I don't think you can use a CDMA phone on a GSM network and vice versa.
EDIT:
Per the replies below, it looks like it ispossible.
Here is a thread from the Verizon forums.
Also, if this WIKI page is correct, the Verizon S4 has both CDMA and GSM radio's where the ATT S4 only has a GSM radio.

The first thing to identify on the phone is whether or not it is on the stock AT&T ROM and what version that ROM is. If it is I337UCUAMF3 then changing the bootloader/kernal/rom is not even an option to begin with which means there would be no way to change out the modem to support other carrier bands (such as those used by Verizon). On top of that, although I have heard that the modem hardware is the same on all versions of the S4 I have not heard anyone confirm that they have successfully enabled CDMA services on the I337.

rayburne said:
Verizon/Sprint phones use CDMA.
ATT/T-Mobile use GSM
I don't think you can use a CDMA phone on a GSM network and vice versa.
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There are some that work on other networks without the need for modem changes. I read about some using the Verizon on AT&T, and I used the droid Bionic, a Verizon exclusive with a locked boot loader, on AT&T.
Sent from my SGH-I337 using xda app-developers app

The strange thing is you can use a Verizon S4 on AT&T but you can't do it the other way around. Verizon phones all come unlocked, allowing you to use the phone anywhere around the world.
The AT&T S4 does not contain the CDMA chip allowing you to use it on the Verizon network, plus it has to do something with IMEI. If you give the IMEI to Verizon, they won't be able to locate which device you are trying to activate because it's not in the system. But if you use a Verizon S4 and put in a AT&T SIM card, you don't have to register the IMEI with AT&T or T-Mobile.

emckai said:
The strange thing is you can use a Verizon S4 on AT&T b.
you can't do it the other way around. Verizon phones all come unlocked, allowing you to use the phone anywhere around the world.
The AT&T S4 does not contain the CDMA chip allowing you to use it on the Verizon network, plus it has to do something with IMEI. If you give the IMEI to Verizon, they won't be able to locate which device you are trying to activate because it's not in the system. But if you use a Verizon S4 and put in a AT&T SIM card, you don't have to register the IMEI with AT&T or T-Mobile.
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I can confirm that this is true about the verizon s4. I have a Verizon s4 and have used AT&T and straight talk on it. My brother uses that phone daily on his AT&T account.
I will test my AT&T s4 when I get around to finding my sim card.

sundigen said:
I can confirm that this is true about the verizon s4. I have a Verizon s4 and have used AT&T and straight talk on it. My brother uses that phone daily on his AT&T account.
I will test my AT&T s4 when I get around to finding my sim card.
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I'm pretty sure you won't be able to use an AT&T S4 on Verizon because the AT&T S4 doesn't have the CDMA capabilities.

emckai said:
I'm pretty sure you won't be able to use an AT&T S4 on Verizon because the AT&T S4 doesn't have the CDMA capabilities.
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Yea I noticed that the ATT S4 doesn't have everything that the Verizon S4 has in the service menu. Like I can turn on all the different bands in the service menu, but on my ATT S4 I get restrictions on wcdma.
I'm new to all this. I traded a iPhone for the ATT version because I couldn't figure out how to make the Verizon version work on straight talk..
Not two days after I have the ATT I somehow got it working... Lol. So now I have two with unlocked bootloaders and sum unlocked...

sundigen said:
Yea I noticed that the ATT S4 doesn't have everything that the Verizon S4 has in the service menu. Like I can turn on all the different bands in the service menu, but on my ATT S4 I get restrictions on wcdma.
I'm new to all this. I traded a iPhone for the ATT version because I couldn't figure out how to make the Verizon version work on straight talk..
Not two days after I have the ATT I somehow got it working... Lol. So now I have two with unlocked bootloaders and sum unlocked...
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Methods used to obtain this?
I am I believe sim unlocked because I no longer see the prompt for password apon boot but the verizon doesn't connect.
Thank you in advance!

[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.
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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!!
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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!!
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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.
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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 ?

AT&T LG G2 unlock for t moblie 411

Hi,
I did an unlock for this phone that i found in these forums. I have a generic tmobile sim card and put that in after i got the unlock code. from there i typed in the info and tmobile showed up on the banner.
well, i took the phone to a guy to trade for another, and now he's telling me he isn't getting any data, just phone and texting. of course, he's telling me this long after we made the trade.
is there any reason he wouldn't be getting data? or does an unlocked lg g2 only get edge speeds or something?
any help would be great.

My first guess is that he doesn't have the correct APN settings put in for his carrier.
You should let everyone know if the device is a stock rom, or another rom. Since the stock AT&T rom should not have the APN settings for Tmobile, but something like CM's rom should.
Worst case he should just need to enter the APN settings by hand, which isn't too hard to do. Other then that he could be in an area where Tmobile uses different bands for data then the AT&T version supports... that part I don't know how much it effects the AT&T G2, but has effected older devices going between AT&T and Tmobile.

Niscandia said:
My first guess is that he doesn't have the correct APN settings put in for his carrier.
You should let everyone know if the device is a stock rom, or another rom. Since the stock AT&T rom should not have the APN settings for Tmobile, but something like CM's rom should.
Worst case he should just need to enter the APN settings by hand, which isn't too hard to do. Other then that he could be in an area where Tmobile uses different bands for data then the AT&T version supports... that part I don't know how much it effects the AT&T G2, but has effected older devices going between AT&T and Tmobile.
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thanks, and it is a stock rom, non-rooted. is that info available online? he says he went to the store and they tried to tell him it wasn't unlocked, or it's only half unlocked...people...especially people who sell phones.

dmoss74 said:
thanks, and it is a stock rom, non-rooted. is that info available online? he says he went to the store and they tried to tell him it wasn't unlocked, or it's only half unlocked...people...especially people who sell phones.
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Google would be your friend in this case, or his actually.
And can't blame them too much, they aren't given all the training that they should be given. They are just sales people, not tech trained most of the time. Every time I go into the AT&T store that I like, I end up talking unlocking & rooting for Android devices since they aren't told anything about that stuff. And I do let them know if they are truly interested to look here for more help.

[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.
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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).
.

Verizon vs T-Mobile S5 for TING?

Hello all,
I will need some UberGeek advice for this one...lol
I use TING as my MVNO provider. They offer CDMA and GSM networks backboning on Sprint and T-Mobile. I had to get a new phone and ordered a Sprint CDMA version G900P but received a Verizon model G900V. It works perfectly fine on the TING network.
I am just wondering if there is any reason not to get this phone and to go with a T-Mobile model instead? I normally would go Sprint/CDMA but wanted to try out GSM this time. Both have excellent coverage in my area. I also know about the ATT/Verizon bootloader being locked. I have already rooted this and it's running Lollipop just fine a sper the instructions found in threads here.
TING told me the phone is no different essentially and there should be no problems. As always their cust, svc. was excellent and informative. This phone apparently has dual radios...CDMA and GSM. I don't have to worry about warranties, KNOW tripping or Verizon's bs. As I said, I am rooted and running fine. I will either debloat this sucker or go with another ROM. Right now THE only bugaboo I see is that there are so few ROMs for the Verizon model. I am not into switching ROMs. If I ditch a debloated stock setup, it would have to be very something very clean and stable based on Lollipop. Seems like CM 12.1 could be nice but right now slightly risky and they don't have the Fingerprint feature working either.
Does anyone feel it would be smarter to return this and get a T-Mobile model? Any food for thought or advice or "Here is why you'll regret the Verizon model 6 months from now" kind of advice?
Thanks in advance!!!!!!!!

Besides the locked bootloader, the G900V is the same phone as the rest of the S5's (of course with different radios for CDMA). If you're cool with just running stock firmware forever then keep the Verizon model. The T-Mobile model would allow you to do whatever you like with it though, as the bootloader is unlocked. Virtually no possibility of losing root.

Sean89us said:
Besides the locked bootloader, the G900V is the same phone as the rest of the S5's (of course with different radios for CDMA). If you're cool with just running stock firmware forever then keep the Verizon model. The T-Mobile model would allow you to do whatever you like with it though, as the bootloader is unlocked. Virtually no possibility of losing root.
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Thanks for the response. Pretty much what I figured. I have it rooted and using Safe Strap and MIGHT toy with CM 12.1 since there are many out there with the Verizon model that seem to like it. Plenty of YouTube videos too.