Database Users

[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.
Click to expand...
Click to collapse
Nope. it won't work.

xuanphucn said:
Nope. it won't work.
Click to expand...
Click to collapse
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?
Click to expand...
Click to collapse
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.
Click to expand...
Click to collapse
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.
Click to expand...
Click to collapse
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.
Click to expand...
Click to collapse
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.
Click to expand...
Click to collapse
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.
Click to expand...
Click to collapse
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...
Click to expand...
Click to collapse
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.
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] Help on which to get

I preordered a Samsung galaxy note 4 AT&T version allready but i can just change it need be, heres my problem, i want to be able to root and unlock the bootloader when i get my note 4 but i found out that att always has there bootloader locked, i found this out because i bought an s5 on att and couldnt unlock the bootloader so i was stuck with it until i got my htc one m8, but now im switching over to a galaxy note 4 and im on the att network, i would like to know which variant i should get so i can root, unlock the bootloader and have att 4G LTE or something just as fast like HSPA or something like that, i dont want to get stuck with out root or an unlocked bootloader or have terrible service. Please somebody help me out. Thanks, Joshua

Joshua.n said:
I preordered a Samsung galaxy note 4 AT&T version allready but i can just change it need be, heres my problem, i want to be able to root and unlock the bootloader when i get my note 4 but i found out that att always has there bootloader locked, i found this out because i bought an s5 on att and couldnt unlock the bootloader so i was stuck with it until i got my htc one m8, but now im switching over to a galaxy note 4 and im on the att network, i would like to know which variant i should get so i can root, unlock the bootloader and have att 4G LTE or something just as fast like HSPA or something like that, i dont want to get stuck with out root or an unlocked bootloader or have terrible service. Please somebody help me out. Thanks, Joshua
Click to expand...
Click to collapse
Joshua,
Welcome to XDA. The T-Mobile USA version will support all of AT&T's frequencies, with full LTE support. Many people here opt to go for the T-Mobile version because they don't lock down the bootloader and usually within the first week it has root access. Be advised, getting the TMO version may not be super easy, as there have been different reports from members here. Some stores refuse to sell it to you outright without an account. Some stores you can walk right in, have no account, and buy it. Then there is the unlocking process. Not too hard to find a cheap site.
I have bought the TMO Note 3, and S5 outright for use on AT&T. When I had the TMO Note 3, I had nothing but reception issues with LTE, despite the phone having band 17 (AT&T) support. Whenever the phone was connected to LTE on AT&T, it sucked. The -dbm was always higher than an AT&T branded Android (yes I compared) and my then iPhone 5S. In places I had good LTE reception with my 5S, I was getting HSPA+ on my TMO Note 3. I returned it because I couldn't stand it.
The TMO S5 on AT&T was better, but still not excellent. I ended up returning the device because I hated it haha. But nonetheless, when you use a TMO device on AT&T you forfeit things like carrier aggregation (which AT&T is working on now) and visual voicemail. You also have to worry about who to contact if your device malfunctions. You'll have to jump through a lot of hoops because Samsung and T-Mobile will just keep pointing the finger at the other guy. Obviously if your an AT&T customer your no subscribing to T-Mobile's jump insurance program.
So yeah, I hope I gave you some help advice. Yeah I HATE supporting AT&T branded devices, but at the end of the day, I'd rather spend my time enjoying my device instead of finding ways to optimize the signal or trying to read up on flashing a new modem.

Just a quick question if I continue to get the note 4 AT&T variant will towel root work on it, I don't even care so much for the boot loader but there are simple things with root that I just love and can't be without like the SD fix, any idea?

Joshua.n said:
Just a quick question if I continue to get the note 4 AT&T variant will towel root work on it, I don't even care so much for the boot loader but there are simple things with root that I just love and can't be without like the SD fix, any idea?
Click to expand...
Click to collapse
Now that the developer went to work for Google, Towel Root is dead.

JimSmith94 said:
Now that the developer went to work for Google, Towel Root is dead.
Click to expand...
Click to collapse
So there wont be a root for att note 4? Unless someone else comes up with one?

Joshua.n said:
So there wont be a root for att note 4? Unless someone else comes up with one?
Click to expand...
Click to collapse
Chainfire is hard at work rooting them as he gets the system dumps. So far, there is no root that doesn't trip Knox on any Samsung phone running 4.4.4 (or greater). From what I've read, Google hired the Towel Root developer to plug that security hole.

JimSmith94 said:
Chainfire is hard at work rooting them as he gets the system dumps. So far, there is no root that doesn't trip Knox on any Samsung phone running 4.4.4 (or greater). From what I've read, Google hired the Towel Root developer to plug that security hole.
Click to expand...
Click to collapse
Well I hope chainfire makes a breakthrough. Smart of Google but kind of a piss off

Joshua.n said:
Well I hope chainfire makes a breakthrough. Smart of Google but kind of a piss off
Click to expand...
Click to collapse
Chainfire's root process has always tripped Knox.

JimSmith94 said:
Chainfire's root process has always tripped Knox.
Click to expand...
Click to collapse
THIS...

[Q] Rooted At&t phone on Tmobile, how do I get...

Hey guys. I have and Unlocked and rooted i9505 S4 (at&t branded), currently running the Goldeneye rom. I recently switched to T-mobile and wanted to make use of their wifi-calling feature but even after installing the t-mobile sim card, I dont see an option for wifi calling anywhere.
can anyone suggest a way I can get wifi-calling on my unlocked/rooted at&t branded s4? thanks!

I think you might need to take it to T-Mobile store. From my understanding, it is only for SGH-M919. AT&T phones are not compatible, even if you switch carriers. You may have to flash a T-Mobile Touchwiz rom, not sure. If anyone thinks I'm wrong, feel free to correct me. :cyclops:

RootNerd said:
I think you might need to take it to T-Mobile store. From my understanding, it is only for SGH-M919. AT&T phones are not compatible, even if you switch carriers. You may have to flash a T-Mobile Touchwiz rom, not sure. If anyone thinks I'm wrong, feel free to correct me. :cyclops:
Click to expand...
Click to collapse
Thx for the reply rootnerd! yea thats the problem i'm having... I read that some people got it working with a flashed a T-mobile rom while others said they couldn't. So I was trying to see if anyone could shed some light as to which T-mobile roms with the wifi calling feature could be flashed via safestrap on an at&t phone, because I don't really want to buy a new phone from t-mo just yet

thatwasntnice said:
Thx for the reply rootnerd! yea thats the problem i'm having... I read that some people got it working with a flashed a T-mobile rom while others said they couldn't. So I was trying to see if anyone could shed some light as to which T-mobile roms with the wifi calling feature could be flashed via safestrap on an at&t phone, because I don't really want to buy a new phone from t-mo just yet
Click to expand...
Click to collapse
Yeah this is where AT&T users would know the answer. I currently have a T-Mobile S4 but I really don't think it's worth keeping Touchwiz just for WiFi calling. But everyone has there own perspective.

[Q] US Cellular S5 on Verizon Network? Possible?

Sorry If I come across as a newbie here, just looking for some help
I had to switch providers, so I paid off the contract on my USC S5, and got a new S5 from Verizon (Don't ask why lol, long story.)
I have a friend who I really want to give this USC phone to, but they are also on Verizon. I need to get her on this phone with her current plan preferably with the SIM she already has I really do hope this is possible, she could really use it.
I need to know how to go about getting it on her network. Do I need to Factory Unlock?
If so, How?
(I don't even know if it is locked)
Phone in question is currently rooted and running Cyanogen Mod 12.
SM-G900R4
16GB
Really do appreciate any input on this. Thank you