[Q] Mod to enable GSM Radio on Verizon SGS3? - Verizon Samsung Galaxy S III

Does anyone know if its at all possible to build a mod that can enable the GSM Radio for the Verizon SGS3? As of now only the CDMA and LTE radios are enabled, but Verizon plans to enable global roaming "in a future update". Seeing as how i'll be going oversees in 2 weeks I'd like to know if any of you talented devs has thought about creating a script or mod to enable global GSM roaming?

enable GSM radio on vz sgs3
Someone should correct me if I'm wrong, but I believe adding GSM support would require 2 things:
1) support in the modem software (I don't think we have the source for this right now)
2) support in the kernel (I also don't think we have the source for this either)
I think we are at the mercy of VZW's release schedule for global roaming until we can solve our bootloader issues and get source (which may never happen).
Right now, InvisibleK and other devs are devoting a lot of resources to flashing a custom bootloader. So far, they've been able to flash a custom boot.img to the recovery partition (including an insecure kernel). A potential downfall is that we loose our recovery partition in the process. They've been able to overwrite the bootloader but there is another check somewhere else. Perhaps a HW check in the snapdragon s4 (qualcomm secureboot)?

kola1228 said:
Does anyone know if its at all possible to build a mod that can enable the GSM Radio for the Verizon SGS3? As of now only the CDMA and LTE radios are enabled, but Verizon plans to enable global roaming "in a future update". Seeing as how i'll be going oversees in 2 weeks I'd like to know if any of you talented devs has thought about creating a script or mod to enable global GSM roaming?
Click to expand...
Click to collapse
I have noticed GSM settings and international settings as well on sprint's version. I wonder if they plan on doing the same thing..
I'll be following this thread.
Sent from my SPH-L710 using xda premium

mybook4 said:
Someone should correct me if I'm wrong, but I believe adding GSM support would require 2 things:
1) support in the modem software (I don't think we have the source for this right now)
2) support in the kernel (I also don't think we have the source for this either)
I think we are at the mercy of VZW's release schedule for global roaming until we can solve our bootloader issues and get source (which may never happen).
Right now, InvisibleK and other devs are devoting a lot of resources to flashing a custom bootloader. So far, they've been able to flash a custom boot.img to the recovery partition (including an insecure kernel). A potential downfall is that we loose our recovery partition in the process. They've been able to overwrite the bootloader but there is another check somewhere else. Perhaps a HW check in the snapdragon s4 (qualcomm secureboot)?
Click to expand...
Click to collapse
hmm interesting.. so if we ever get an unlocked bootloader it should be it do-able?

bump
has anyone been working on this?

kola1228 said:
bump
has anyone been working on this?
Click to expand...
Click to collapse
i guess not =( would be nice ya know for sprint to be able to work with gsm.
not sure they have the slot for the sim though.

If Verizon plans on adding support then maybe all it needs is an unlock. Anyone with an unlocked verizon gs3 try a GSM sim?

jasonyump said:
If Verizon plans on adding support then maybe all it needs is an unlock. Anyone with an unlocked verizon gs3 try a GSM sim?
Click to expand...
Click to collapse
Mike Reid, developer of Spirit Radio app, has been working a lot on this. He states the problem is with the LTE radio in the North American version. http://forum.xda-developers.com/showthread.php?t=1732685

Related

Sprint to Verion and vice-versa

Noob question.
Now that we have an unlocked bootloader is the vzw hw so different from the sprint one?
Can we somehow install a custom rom (stock or no) that was designed for the S3 sprint one and vice-versa from vzw to sprint? Without porting.
If not then why?
Good Question, I would like to know this too. (BUMP)
jb_alphamale said:
Noob question.
Now that we have an unlocked bootloader is the vzw hw so different from the sprint one?
Can we somehow install a custom rom (stock or no) that was designed for the S3 sprint one and vice-versa from vzw to sprint? Without porting.
If not then why?
Click to expand...
Click to collapse
No, you are most likely not going to be able to use a Sprint rom on this phone. They use different radios and most likely a different bootloader.
Also, the LTE frequency for both devices are different and the Sprint version uses the 800, 850 and 1900mhz cdma frequencies wheres the verizon version is only 850 and 1900. The Sprint uses 1900Mhz for 4G as well.
I think the only way this would work would be if a dev made a rom that was specifically for the CDMA version of the phones and would detect which type it was running on before flashing

Samsung galaxy s t959v 3g and 4g not work

not work me the 3 g or 4 g in my phone, is originally from t-mobile and I have it with orange, any way to resolve this problem?
You need to provide more information about what the problem is. The more information, the easier it is to diagnose the problem.
What ROM/Kernel are you running? Are your APNs set correctly? Did you install something that might affect the radios?
Woody said:
You need to provide more information about what the problem is. The more information, the easier it is to diagnose the problem.
What ROM/Kernel are you running? Are your APNs set correctly? Did you install something that might affect the radios?
Click to expand...
Click to collapse
the ROM is Cyanogenmod 9.1.0 Release 8 http://forum.xda-developers.com/showthread.php?t=1730954 APN is correctly, to unlock it, use the SGS4G AROMA Unlocker
delvi_65 said:
the ROM is Cyanogenmod 9.1.0 Release 8 http://forum.xda-developers.com/showthread.php?t=1730954 APN is correctly, to unlock it, use the SGS4G AROMA Unlocker
Click to expand...
Click to collapse
I've used my tmobile sgs4g on orange, it works just fine, you just need to remember to call up t-mo and enable international roaming.

US Cellular Galaxy S3 & Verizon Galaxy S3

Is hardware US Cellular Galaxy S3 same Verizon Galaxy S3 ?
I want to install rom Verizon Galaxy S3 for US Cellular Galaxy S3
Is it will working fine !
apas100 said:
Is hardware US Cellular Galaxy S3 same Verizon Galaxy S3 ?
I want to install rom Verizon Galaxy S3 for US Cellular Galaxy S3
Is it will working fine !
Click to expand...
Click to collapse
Don't do that,it will break your phone ...
Don't do that..
manojcitc said:
Don't do that,it will break your phone ...
Don't do that..
Click to expand...
Click to collapse
Do u mean it will break the phone ( the phone will not power on ) or break carrier
Because I don't care about carrier , I am going to flashing it
apas100 said:
Do u mean it will break the phone ( the phone will not power on ) or break carrier
Because I don't care about carrier , I am going to flashing it
Click to expand...
Click to collapse
Yes the hardware is the same so go ahead and brick your phone. You fail to comprehend the fact the ROM has to be ported for us cellular for it to actually work.
jmxc23 said:
Yes the hardware is the same so go ahead and brick your phone. You fail to comprehend the fact the ROM has to be ported for us cellular for it to actually work.
Click to expand...
Click to collapse
Sorry I didn't get what u mean
I want flash a Verizon ROM onto the US Cellular Galaxy S3 , Is it will working coz it same hardware
The fact it is the same hardware doesn't change the fact that you have to alter the software/ROM to work on another carrier. That is where porting comes in and lucky for you there are some ROMs here that are multiple carrier ROMs .
I am going to try this rom Galaxy S3 Verizon (I535VRBLK3) for my phone
You are still not getting it. It will not work it is meant for those with Verizon as their cell phone carrier. Plus it is stock version not a ported custom ROM meaning it isn't altered and made to work on another carrier. Let me put it in caps "DON't FLASH IT AS IT WILL BRICK YOUR PHONE" I hope you got that. See you are on US Cellular and must flash ROMs for that carrier so you can't flash the ROM you want to flash but that same ROM I can flash because I HAVE VERIZON so i won't f**k up my phone.
jmxc23 said:
You are still not getting it. It will not work it is meant for those with Verizon as their cell phone carrier. Plus it is stock version not a ported custom ROM meaning it isn't altered and made to work on another carrier. Let me put it in caps "DON't FLASH IT AS IT WILL BRICK YOUR PHONE" I hope you got that. See you are on US Cellular and must flash ROMs for that carrier so you can't flash the ROM you want to flash but that same ROM I can flash because I HAVE VERIZON so i won't f**k up my phone.
Click to expand...
Click to collapse
I didn't do it yet , I want u to know that , I don't care about carrier
I will use it out US , so I just care if the phone will work or not after install rom Galaxy S3 Verizon
apas100 said:
I didn't do it yet , I want u to know that , I don't care about carrier
I will use it out US , so I just care if the phone will work or not after install rom Galaxy S3 Verizon
Click to expand...
Click to collapse
Your phone will not work if you install that ROM. Do not install it.
apas100 said:
I didn't do it yet , I want u to know that , I don't care about carrier
I will use it out US , so I just care if the phone will work or not after install rom Galaxy S3 Verizon
Click to expand...
Click to collapse
In all 3 of my posts I stated that it won't work and why it won't work and yet you are still asking the same question. Either you are trolling the site or you are really are lacking intelligence as I stated that it won't work and it doesn't help that your posts make you sound like English is your second language. If you are using it outside the US then a different ROM won't help you but unlocking the SIM card can.
---------- Post added at 02:07 PM ---------- Previous post was at 02:05 PM ----------
landshark68 said:
Your phone will not work if you install that ROM. Do not install it.
Click to expand...
Click to collapse
He doesn't comprehend that is I posted that now 4 times already and he is causing me to want a bottle of scotch.
jmxc23 said:
In all 3 of my posts I stated that it won't work and why it won't work and yet you are still asking the same question. Either you are trolling the site or you are really are lacking intelligence as I stated that it won't work and it doesn't help that your posts make you sound like English is your second language. If you are using it outside the US then a different ROM won't help you but unlocking the SIM card can.
---------- Post added at 02:07 PM ---------- Previous post was at 02:05 PM ----------
He doesn't comprehend that is I posted that now 4 times already and he is causing me to want a bottle of scotch.
Click to expand...
Click to collapse
Yeah, you posted 4 different times in 4 different ways he shouldn't flash the VZW ROM, and he still wasn't getting it. So I spelled it out as plain and simple as possible. I figured like you did he is either trolling or English is a second language, or not even a second language. I also figured with as many times as you responded, you might actually bypass the bottle of scotch and go straight to hitting yourself over the head with a hammer
Sorry to make u angry
I just looking for way to use my phone
Because I can use Verizon for GSM in my country but US Cellular I can't
I was thinking like that because both of them has same hardware
Sorry again
My pet peeve is having to repeat myself which makes me angry despite being a mellow person. I just got through blowing the heads of zombies in Dead Island so I am back to being mellow. You will have to SIM unlock your phone if you're going overseas and insert a Verizon SIM card onto your phone.
Im gonna try to tackle this in a certain way:
There is a thing in mobile phones called firmware. It is like a combo of hardware and software. One thing it allows is software updates to how the hardware works. You know how you can update your bios on your desktop computer? This is a firmware update.
The firmware on US Cellular and Verizon versions of our phone are different. When you flash a verizon rom to your phone, it writes information to the firmware in a way that verizon phones are designed to work with. The US cellular firmware is different, so flashing a verizon rom on your phone will corrupt the firmware and make your phone dead.
Basically, even though the hardware is the same, the part that updates the code within the hardware is different, and verizon roms are not compatible with us cellular roms for this reason.
You can only flash roms designed specifically for US cellular phones. Some roms on the forum have the tag D2USC. These roms will work with your phone.
Sent from my SCH-I535
sfetaz said:
Im gonna try to tackle this in a certain way:
There is a thing in mobile phones called firmware. It is like a combo of hardware and software. One thing it allows is software updates to how the hardware works. You know how you can update your bios on your desktop computer? This is a firmware update.
The firmware on US Cellular and Verizon versions of our phone are different. When you flash a verizon rom to your phone, it writes information to the firmware in a way that verizon phones are designed to work with. The US cellular firmware is different, so flashing a verizon rom on your phone will corrupt the firmware and make your phone dead.
Basically, even though the hardware is the same, the part that updates the code within the hardware is different, and verizon roms are not compatible with us cellular roms for this reason.
You can only flash roms designed specifically for US cellular phones. Some roms on the forum have the tag D2USC. These roms will work with your phone.
Sent from my SCH-I535
Click to expand...
Click to collapse
I will also add that ROMs that are multi-carrier compatible are compatible with US Cellular just make sure you choose your current carrier.
Thanks sfetaz for elucidation
So is there any ROM Supports GSM & CDMA as ROM Verizon , Can I use it with US Cellular
Just go into the development section and download Axis. Make sure that you root your phone, unlock your bootloader, make a nandroid of your current image, back up your IMEI, and choose US Cellular in the options screen for carrier. You will then have flashed a custom ROM to your phone.
READ everything about all of the steps and UNDERSTAND what you are doing before you start or you will brick your phone!
HHF2 said:
Just go into the development section and download Axis. Make sure that you root your phone, unlock your bootloader, make a nandroid of your current image, back up your IMEI, and choose US Cellular in the options screen for carrier. You will then have flashed a custom ROM to your phone.
READ everything about all of the steps and UNDERSTAND what you are doing before you start or you will brick your phone!
Click to expand...
Click to collapse
Okay, just happened across this line of interesting conversation. But, I do have a question. Is there any way to change a phones firmware to allow it to expect another carriers ROM or is that simply a pipe dream?
This is strictly a mental excersize....
Thanks,
Darkhlmt said:
Okay, just happened across this line of interesting conversation. But, I do have a question. Is there any way to change a phones firmware to allow it to expect another carriers ROM or is that simply a pipe dream?
This is strictly a mental excersize....
Thanks,
Click to expand...
Click to collapse
Darkhlmt I'm not sure what you're looking for, but I know people with the Canadian variants can edit their build prop to accept d2att ROMs, but they share model numbers (Canadians add an m at the end)
APAs, there are a few ROMs compatible between vzw and USC and I mean few. You're better off hitting the forums at teamuscellular.com for your device, rather than risking bricking your phone

[Q] Native GSM/WCDMA/HSPA+ support on XT897 (not XT897c)?

Hello all, new to the Photon Q forum My Photon Q should be arriving tomorrow and I have a question here...
As I have done my homework, there are 2 variants of this phone apparently named xt897 and xt897c (as seen on CM website), which, judging from the name, should be respectively designed for GSM or CDMA networks. The one I've purchased is already SIM-modded to accept micro-SIMs, and according to the reseller, the phone "works natively on GSM/WCDMA/HSPA+", so...
1) Am I safe to assume that I will have a xt897 variant instead of a xt897c?
2) Will flashing a ROM specifically designed for the xt897 variant, for example the official CM11, break GSM support? Do I need a "GSM Patch" like the Droid 4? Or am I good to go immediately after flashing the ROM?
Thanks in advance for any answers.
No GSM patch needed.
CM11 will soon eliminate the need for separate variants, they will now all be handled as XT897.
Previous to CM11, your statement is correct. The XT897C tree is deprecated, I don't think it's being built anymore by CM.
arrrghhh said:
No GSM patch needed.
CM11 will soon eliminate the need for separate variants, they will now all be handled as XT897.
Previous to CM11, your statement is correct. The XT897C tree is deprecated, I don't think it's being built anymore by CM.
Click to expand...
Click to collapse
Yay.
Wait... @arrrghhh, Have I seen you somewhere else? The name seems familiar, but I can't remember...
Sent from Samsung Galaxy Nexus @ CM11

D850 sim locked to AT&T - questions about sim unlocking and flashing T-Mo ROM

I recently received an AT&T G3 from a friend and would like to use it on T-Mobile, with T-Mobile's wi-fi calling enabled since I get terrible signal inside my home. The phone is currently sim locked to AT&T. I do have it rooted but that's as far as I've gone.
I have two questions:
1) what is the best way to sim unlock? does anyone recommend a service? I'd like to get this done quickly so that I can begin messing with it on T-Mobile.
2) will I be able to install a stock T-Mo ROM on the device to access T-Mo specific features/apps, and how would I go about doing that? I am familiar with flashing ZIPs and reverting back to stock, but I've never gone cross-carrier before. Does it even matter?
thescinema said:
I recently received an AT&T G3 from a friend and would like to use it on T-Mobile, with T-Mobile's wi-fi calling enabled since I get terrible signal inside my home. The phone is currently sim locked to AT&T. I do have it rooted but that's as far as I've gone.
I have two questions:
1) what is the best way to sim unlock? does anyone recommend a service? I'd like to get this done quickly so that I can begin messing with it on T-Mobile.
2) will I be able to install a stock T-Mo ROM on the device to access T-Mo specific features/apps, and how would I go about doing that? I am familiar with flashing ZIPs and reverting back to stock, but I've never gone cross-carrier before. Does it even matter?
Click to expand...
Click to collapse
If the phone was fully paid off you can unlock it for free on att website.
No you cannot. You'll run into big issues and or soft brick you can only flash what your model is. You may flash a custom D851 based custom rom if that's available if someone's built it for the D850 but you cannot flash other models stock roms.
Sent from my iPhone using Tapatalk
hyelton said:
If the phone was fully paid off you can unlock it for free on att website.
No you cannot. You'll run into big issues and or soft brick you can only flash what your model is. You may flash a custom D851 based custom rom if that's available if someone's built it for the D850 but you cannot flash other models stock roms.
Sent from my iPhone using Tapatalk
Click to expand...
Click to collapse
Thank you hyelton. Have you heard of any D851 based ROMs with wifi calling enabled that will work on the D850?
thescinema said:
Thank you hyelton. Have you heard of any D851 based ROMs with wifi calling enabled that will work on the D850?
Click to expand...
Click to collapse
Sorry I have not, never had to do so but I have seen it around before. Check out the development section for the D850 you may find something there custom rom wise.
Sent from my iPhone using Tapatalk

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