Develop Bugs

[Q] HELP! Can I switch the AT&T S3 to Verizon?

I have Verizon, a Motorola Razr (Not MAXX) and it is crapping out on me, running slow, not sending picture messages etc.
My boyfriend has a trading post type store and he bought a brand new Galaxy S3 but it's through AT&T. When I put my SIM card in the S3 it asked for a SIM Pin for unlocking.
I have experience rooting a Nook Tablet so with some directions I'll probably be able to do it, I just don't know where to even start. Do I just unlock the phone or is there a way to switch it over?
Thanks!!
Ashley

It seems like you just need an unlock code to use it with your old SIM.
http://forum.xda-developers.com/showthread.php?t=1962453
Try taking a look at this thread and see if you can get an unlock code from AT&T.

crazililazn said:
It seems like you just need an unlock code to use it with your old SIM.
http://forum.xda-developers.com/showthread.php?t=1962453
Try taking a look at this thread and see if you can get an unlock code from AT&T.
Click to expand...
Click to collapse
So I called AT&T and they gave me the unlock code. I used it and it said unlocking the mobile network was successful. I tried to make a call and it said that only emergency calls were available. I restarted the phone and when making a call it said no mobile network can be found.

Ohhh you are putting a Verizon sim card in it? I don't think that will work since Verizon's network and lte use different technologies than at&t and the sim card is encoded to use the respective technology :X
Sent from my SGH-I747 using xda premium

Yea I have a Verizon SIM card. On my verizon RAZR I have the option to switch betwee CDMA/LTE, Global, and GSM. I know AT&T run off GSM but if my Razr has the option to switch does the S3??

aknuth87 said:
Yea I have a Verizon SIM card. On my verizon RAZR I have the option to switch betwee CDMA/LTE, Global, and GSM. I know AT&T run off GSM but if my Razr has the option to switch does the S3??
Click to expand...
Click to collapse
That would mean you can insert a gsm sim card into the RAZR maxx because it is a world phone. However, the at&t s3 does not support CDMA, which is the network technology that Verizon uses. That's probably why you are getting no mobile network when inserting your Verizon SIM card in the AT&T s3.
Sent from my SGH-I747 using xda premium

The gsm sim that comes in Verizon global phones is there so when you travel out of the country you can use a cdma phone in countries that have a primary backbone that is gsm. In the us your phone uses Verizon's cdma network. If it does not see that network it will then look to the sim card to see if global gsm networks are detected.
To my knowledge this is going to be a no-go. If you have not done so, clean up your sd card, toss a factory data reset at your razor. These android phones are pretty tough.
Sent from my SAMSUNG-SGH-I747 using Tapatalk 2

CDMA/GSM? for Sprint Note 2

Hi,
Quick question, I know all about carrier locks on devices as such. Does anyone know if the Note 2 sprint has the capability to run on GSM only rather CDMA. I know sprint has it locked to there network. But interested if i get it unlcoked one day and want to put a sim into it if its possible.
thanks

Sim is embedded in the phone and is not replaceable, at least not without some serious hardware modifications. It also has no sim slot... So for GSM you're stuck with Sprints providers
Sent from my SPH-L900 using xda premium

[Q] Help with Verizon Nexus converted to Prepaid Please?!?

Hey guys I am going to try and make this quick and please forgive me I am new to the Nexus. I have been all over this forum and others e.g. XDA, Android Central etc. I have gotten a lot of different info. about how to switch my Verizon Nexus to Prepaid. However I just bought this phone at my bosses pawn shop w/out the SIM card and the guy who sold the phone said it did have service @ one time. In device info the network is unknown, Mobile Network is unknown:0, no phone number, service stat. out of service, MIN: unknown, but does have the MEID & IMEI numbers. I know no SIM card has a lot to do with this info. Verizon will not unlock it for me so I was wondering what I needed to do to be able to unlock this bad boy. I have root and JBSourcery flashed and loving it I might add. Do I just need to get the SIM card so when I use the # and number keys to unlock it the phone will not tell me "mobile network not available" Or is there another way that someone would be willing to help me with please. I will keep reading to see what I can find but any info would be greatly appreciated! Thanks guys and I look forward to hearing some ideas.

Are u trying to go to a gsm network? Is so u can't. Technically u can't go to no other network. CDMA device are ment to stay on the original network. And if u are trying to go t a gsm network you are waisting your time. Only reason the Verizon nexus has a sim card is for 4g lte. Cell service only works with CDMA.
Sent from my Galaxy Nexus using xda premium

Esteway.619 said:
Are u trying to go to a gsm network? Is so u can't. Technically u can't go to no other network. CDMA device are ment to stay on the original network. And if u are trying to go t a gsm network you are waisting your time. Only reason the Verizon nexus has a sim card is for 4g lte. Cell service only works with CDMA.
Sent from my Galaxy Nexus using xda premium
Click to expand...
Click to collapse
Right I know that from what I have been reading. I talked to TMobile and they said the phone is compatible with them and they offer the SIM card as well. I was going to go go Verizon today and get the SIM card and try to get the phones info In their system. That way I can USD the dial pad and try to unlock it and use it on their prepaid plan if I have to. I am not picky as far as what company's prepaid I want to use really I just don't want a contract.

you cannot use the verizon galaxy nexus on a tmobile network
CDMA is not GSM.
there is a sim slot on the vzw nexus, but it is for LTE only. voice still uses CDMA.

Zepius said:
you cannot use the verizon galaxy nexus on a tmobile network
CDMA is not GSM.
there is a sim slot on the vzw nexus, but it is for LTE only. voice still uses CDMA.
Click to expand...
Click to collapse
I know that after reading a little more into it. I got the SIM card and now it is picking up verizon network. So really I am SOL with this phone unless I get a contract is that correct? Forgive my lack of knowledge of CDMA etc. I am working on trying to get there by reading more and more about it.

alidust42 said:
I know that after reading a little more into it. I got the SIM card and now it is picking up verizon network. So really I am SOL with this phone unless I get a contract is that correct? Forgive my lack of knowledge of CDMA etc. I am working on trying to get there by reading more and more about it.
Click to expand...
Click to collapse
Yes your SOL.
Sent from my Galaxy Nexus using xda premium

Aaahhh!!! Got to love Verizon!! Thanks for your help.
Sent from GNex Flashed w/JBSourcery & Tapatalk.

Zepius said:
you cannot use the verizon galaxy nexus on a tmobile network
CDMA is not GSM.
there is a sim slot on the vzw nexus, but it is for LTE only. voice still uses CDMA.
Click to expand...
Click to collapse
hI GUYS i AM FROM India, Can i change my galaxy nexus verizon [having sim slot 4g lte] to my home CDMA networks ?Plzzzzzz reply ASAP.................!

[Q] How to get a verizon sim to work on a at&t samsung galaxy s3

How to get a verizon sim card to work on a at&t samsung Galaxy s3.
Can I make ATT Samsung Galaxy S3 work on a verizon sim card?
The phone is rooted and unlocked.
SAMSUNG-SGH-I747
Android version 4.1.2
Baseband version 1747ucdmg2
build # Supreme Deadly Venom v7.1.0

getyasome said:
How to get a verizon sim card to work on a at&t samsung Galaxy s3.
Can I make ATT Samsung Galaxy S3 work on a verizon sim card?
The phone is rooted and unlocked.
SAMSUNG-SGH-I747
Android version 4.1.2
Baseband version 1747ucdmg2
build # Supreme Deadly Venom v7.1.0
Click to expand...
Click to collapse
Unfortunately, can't be done as Verizon uses CDMA and ATT uses GSM. Means radios are completely different.

getyasome said:
How to get a verizon sim card to work on a at&t samsung Galaxy s3.
Can I make ATT Samsung Galaxy S3 work on a verizon sim card?
The phone is rooted and unlocked.
SAMSUNG-SGH-I747
Android version 4.1.2
Baseband version 1747ucdmg2
build # Supreme Deadly Venom v7.1.0
Click to expand...
Click to collapse
impossible until the carriers and technology says so, sorry CDMA+GSM dont mix unless they say so

getyasome said:
How to get a verizon sim card to work on a at&t samsung Galaxy s3.
Can I make ATT Samsung Galaxy S3 work on a verizon sim card?
The phone is rooted and unlocked.
SAMSUNG-SGH-I747
Android version 4.1.2
Baseband version 1747ucdmg2
build # Supreme Deadly Venom v7.1.0
Click to expand...
Click to collapse
What all have u tried so far? I have a friend with a verizon droid dna running a straight talk (at&t) sim, and everything works, calls, text, mms, and internet...

DMF1977 said:
What all have u tried so far? I have a friend with a verizon droid dna running a straight talk (at&t) sim, and everything works, calls, text, mms, and internet...
Click to expand...
Click to collapse
As stated above, Verizon and att use two entirely different networks. The radio hardware is different. Unless the droid dna is a gsm phone that should not be possible.
Sent from my Galaxy Nexus using xda app-developers app

Greycloak42 said:
As stated above, Verizon and att use two entirely different networks. The radio hardware is different. Unless the droid dna is a gsm phone that should not be possible.
Sent from my Galaxy Nexus using xda app-developers app
Click to expand...
Click to collapse
I'm fully aware that they are entirely different networks, but it works. Yes, the verizon dna is cdma, but it also takes a sim card, im assuming because of the 4g lte...

DMF1977 said:
I'm fully aware that they are entirely different networks, but it works. Yes, the verizon dna is cdma, but it also takes a sim card, im assuming because of the 4g lte...
Click to expand...
Click to collapse
That phone is also GSM capable. At that point it's all a matter of the APN settings. It can not be done with the S3 on any carrier (swapping from CDMA to GSM)

getyasome said:
How to get a verizon sim card to work on a at&t samsung Galaxy s3.
Can I make ATT Samsung Galaxy S3 work on a verizon sim card?
The phone is rooted and unlocked.
SAMSUNG-SGH-I747
Android version 4.1.2
Baseband version 1747ucdmg2
build # Supreme Deadly Venom v7.1.0
Click to expand...
Click to collapse
I think you can get the Verizon S3 to work on AT&T (calls/text/edge data). I know you can do that on T-Mobile. But you won't be able to get the AT&T S3 to work on Verizon for two reasons;
1) The radio would need to be hacked to enable the CDMA radio, and the information needed to hack the radio is not available. The US variants all received the same radio chip, just some of the frequencies are turned off. For instance, the AT&T S3 wasn't able to get the t-mobile AWS band working until the guy working for t-mobile released some radio files. The AT&T/T-Mo S3s have the CDMA radio, but it's not enabled
2) Verizon won't allow the phone on the network, as the IMEI is not registered on their network. This is probably the most important reason. You would need to spoof the IMEI from another verizon phone, which is not something that can be discussed here.
You are better off switching with someone who has a Verizon S3, that wants an AT&T S3.

tokuzumi said:
I think you can get the Verizon S3 to work on AT&T (calls/text/edge data). I know you can do that on T-Mobile. But you won't be able to get the AT&T S3 to work on Verizon for two reasons;
1) The radio would need to be hacked to enable the CDMA radio, and the information needed to hack the radio is not available. The US variants all received the same radio chip, just some of the frequencies are turned off. For instance, the AT&T S3 wasn't able to get the t-mobile AWS band working until the guy working for t-mobile released some radio files. The AT&T/T-Mo S3s have the CDMA radio, but it's not enabled
2) Verizon won't allow the phone on the network, as the IMEI is not registered on their network. This is probably the most important reason. You would need to spoof the IMEI from another verizon phone, which is not something that can be discussed here.
You are better off switching with someone who has a Verizon S3, that wants an AT&T S3.
Click to expand...
Click to collapse
It will work with T-Mobile because it's a GSM network. The radio can't be hacked. It's a limitation of the hardware itself. It's 2 completely different pieces of hardware.

The sim card on Verizon phones is ONLY used to access Verizon's LTE, without that simcard you'd have regular 4G only on a Verizon phone. That sim card/or phones acts in no way possible as GSM accessible.
So no it will NEVER work regardless of what you do.
And don't fall for ads on the internet about any Verizon,Sprint, or any CDMA phone to work on GSM networks.

jayRokk said:
The sim card on Verizon phones is ONLY used to access Verizon's LTE, without that simcard you'd have regular 4G only on a Verizon phone. That sim card/or phones acts in no way possible as GSM accessible.
So no it will NEVER work regardless of what you do.
And don't fall for ads on the internet about any Verizon,Sprint, or any CDMA phone to work on GSM networks.
Click to expand...
Click to collapse
This is not entirely true for all Verizon phones. The DNA, S4, Note 2, LG G2 (among others) are sim-unlocked out of the box, and will work with AT&T/T-Mobile (the note 2 requires some hacking in order to add the APN settings). Also, as I recall, if I took the sim card out of my GNex and DNA, I did not have service. It would only allow for emergency calls. No talk/text/2G/3G.
For the Galaxy Nexus, the phone is 100% guaranteed to not work on any GSM network.

tokuzumi said:
This is not entirely true for all Verizon phones. The DNA, S4, Note 2, LG G2 (among others) are sim-unlocked out of the box, and will work with AT&T/T-Mobile (the note 2 requires some hacking in order to add the APN settings). Also, as I recall, if I took the sim card out of my GNex and DNA, I did not have service. It would only allow for emergency calls. No talk/text/2G/3G.
For the Galaxy Nexus, the phone is 100% guaranteed to not work on any GSM network.
Click to expand...
Click to collapse
Read the first sentence
"Only to get Verizon's LTE"
Unlocked phones work "globally"
Which means you'd get Voice and EDGE/3G at the most from other GSM networks, given you've provided the correct APNs. Locked phones, which carry that sim card for Verizon's LTE ONLY. Either way only a few phones will work. The rest are useless.
Sent from my SAMSUNG-SGH-I747 using xda app-developers app

Agent said:
It will work with T-Mobile because it's a GSM network. The radio can't be hacked. It's a limitation of the hardware itself. It's 2 completely different pieces of hardware.
Click to expand...
Click to collapse
No. They use the same hardware. Msm8960. It should support GSM CDMA WCDMA LTE and Td-scdma. Almost all the network. It's mostly because of the lock of the radio/nv.

Remember, the op is asking if he can use an at&t galaxy s3 on Verizon. It's not going to work.

IT WORKS
tokuzumi said:
I think you can get the Verizon S3 to work on AT&T (calls/text/edge data). I know you can do that on T-Mobile. But you won't be able to get the AT&T S3 to work on Verizon for two reasons;
1) The radio would need to be hacked to enable the CDMA radio, and the information needed to hack the radio is not available. The US variants all received the same radio chip, just some of the frequencies are turned off. For instance, the AT&T S3 wasn't able to get the t-mobile AWS band working until the guy working for t-mobile released some radio files. The AT&T/T-Mo S3s have the CDMA radio, but it's not enabled
2) Verizon won't allow the phone on the network, as the IMEI is not registered on their network. This is probably the most important reason. You would need to spoof the IMEI from another verizon phone, which is not something that can be discussed here.
You are better off switching with someone who has a Verizon S3, that wants an AT&T S3.
Click to expand...
Click to collapse
i can verify that i an running AT&T straight talk service on my sch-i535 (Verizon Galaxy s3)

I have had success using a Verizon sg3 mother board on att's network although I was only able to get 2g. What I did was rooted phone, ran region unlock app, next I let the phone sit for a day, then a did a factory reset from the phones menu not custom recovery. Then when going through the set up wizard it prompted me to insert sim card then it said it was not an approved sim and gave options to continue or finish, selected finish, said complete and about 3-5 mins after booting up I got signal bars and phone was working. Although the hardware used are different these are dual band phones.
Never give up keep trying
Sent from my SAMSUNG-SGH-I747 using XDA Premium 4 mobile app

[Q] Straight talk?

Has anyone used this phone with straight talk? do you need to unlock the phone or will their sim card work instantly?

I'm using my AT&T Optimus G Pro with Straight Talk. Works great. If it's a GSM phone you can use Straight Talk.
Sent from my LG-E980 using Tapatalk

No. Their sim card will not work unless you have the phone network unlocked.

droidzika said:
I'm using my AT&T Optimus G Pro with Straight Talk. Works great. If it's a GSM phone you can use Straight Talk.
Sent from my LG-E980 using Tapatalk
Click to expand...
Click to collapse
Yes mine is the AT&T version as well, did you need to unlock your phone? I have seen some saying you do and some saying you don't, but most people aren't on it it's just their thoughts. Since you are on, did you?

I didn't have to..that's the beauty of GSM phones. Most GSM doesn't necessarily have to be unlocked because most use the same frequencies. Also, I could use my Sim card on a T-Mobile phone, if it was GSM.
Sent from my LG-E980 using Tapatalk

1117
I bought mine already unlocked so I have had no issues whatsoever using Straight Talk. Love getting 4G for 45 a month.

Quick tip if you use straight talk all you need to order i straight talk att sim card. That gives you full 4g... If you use the straight talk t mobile sim you'll only get hspa +. If you have the t mobile sim then you'll need to unlock the phone and then set the phone up for T-Mobile network.
Add there is no need to unlock the phone.
Sent from my LG-E980 using XDA Premium 4 mobile app

I have the AT&T G Pro using Straight Talk. I had to network unlock mine. I verified this by putting the ST AT&T sim in before I unlocked it just to be sure and it did give me the "Invalid Sim" error. So this phone IS network locked. AT&T's provisioning is different than Straight Talks. So just because it's an AT&T phone and AT&T compatible sim doesn't necessarily mean it will just accept the sim without network unlocking.

I also have the AT&T G pro. ordered the at&t micro sim from ST and inserted and it worked without having to unlock the network lock. In fact on all of the AT&T branded phones i have used i have never ever had to unlock to use a ST sim card that used the at&t network.
In fact if you go to this link http://www.straighttalk.com/wps/portal/home/shop/sims
it will ask you if your phone is t-mob or AT&T and as long as you get the right sim for your phone, you should not have to unlock it.
I did have to edit my apn and follow the instructions in the thread below to get mms working
http://forum.xda-developers.com/showthread.php?t=2761126

I didn't have to unlock my E980, as I used a AT&T compatible Straight Talk SIM. I get full LTE no troubles, but you have to fool with APNs to get MMS, as with most third-party carriers on other carrier's phones.