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2.3.4 4g ROMS can they be ported?

can they be ported to the tmobile or GSM networks but still recive a 4g signal?

No. The phone needs to have the necessary hardware to receive those signals.

sorry to bump an old thread but I'm wondering if the features could be ported to the stock aosp rom from one hardware type to the other. Possibly building from source but adding things in that certain devs have added.
There seems to be a lot of GSM based roms that arent offered for the SPrint version but I'd love to try them out.
I'm not a dev but if guides were available I'd like to try porting (though I'd probably fail )

[Q] Flashing Other Carriers Kernels?

So someone please explain to me how This Is possible. I was under the belief in my understanding of android that this is a BIG NO NO. I do realize and I may not fully understand the similarities and differences between the different versions of the SGS3 but I would think that because of the Radio being different among all of the carriers that Kernels would be totally different as well. I will reference the Fascinate and the Mesmerize for example. Pretty much the same phone but completely different as far as anything and everything development wise. So what it boils down is this
1. Can we flash kernels designed for the At&t, Sprint, or T-Mobile versions of our phone.
2.What versions of the SGS3 can we SAFELY flash Kernels from.
3.How is this possible given the differences in the different phones.(Question for my sake cause I am really curious and hope i can get a good explanation regarding this)

Aali1011 said:
So someone please explain to me how This Is possible. I was under the belief in my understanding of android that this is a BIG NO NO. I do realize and I may not fully understand the similarities and differences between the different versions of the SGS3 but I would think that because of the Radio being different among all of the carriers that Kernels would be totally different as well. I will reference the Fascinate and the Mesmerize for example. Pretty much the same phone but completely different as far as anything and everything development wise. So what it boils down is this
1. Can we flash kernels designed for the At&t, Sprint, or T-Mobile versions of our phone.
2.What versions of the SGS3 can we SAFELY flash Kernels from.
3.How is this possible given the differences in the different phones.(Question for my sake cause I am really curious and hope i can get a good explanation regarding this)
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Click to collapse
There have been some successful instances of sprint kernels being flashed that I've seen, but it is never a great idea to flash kernels not specifically designed for your phone. btw. there are some pretty good kernels available for vzw now

It's a pretty bad idea. There is a very small chance it could work but more than likely it won't boot

arrogantS3 said:
There have been some successful instances of sprint kernels being flashed that I've seen, but it is never a great idea to flash kernels not specifically designed for your phone. btw. there are some pretty good kernels available for vzw now
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And i figured as much. I am just REALLY surprised it worked and I just kinda wanna know why it worked. The technical reasons to be honest. But to play it safe i will just stick with those kernels that have been made for the Verizon version thus far. I am still hesitant using the Sprint Kernel even knowing it works.

Neverendingxsin said:
It's a pretty bad idea. There is a very small chance it could work but more than likely it won't boot
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And based of of you saying this and me knowing this is why i ask lol. Cause like arrogant says there have been successful flashes of the Sprint Kernel. Again idk everything there is about Android but i wonder if it possible due to the fact our unlocked bootloader is partially sprint or something along those lines. That is why i was hoping someone would see this and chime in with a technical explanation and then either a go for it, no, or tread with caution. When the phone was being released there was talks of a rom kitchen being established between the carriers and i was hoping that this was a part of that. Meaning that someone who Devs for the AT&T version of the SGS3 can have their rom or kernel ported to Sprint version and then the Verizon and T-Mobile variants. Idk if the kitchen is still a possibility or in the works but it would be cool to see it kernel wise considering most are running AOSP based roms.

I tried to flash att one two days ago, can not turn wifi on....
So, not recommended

Aali1011 said:
And based of of you saying this and me knowing this is why i ask lol. Cause like arrogant says there have been successful flashes of the Sprint Kernel. Again idk everything there is about Android but i wonder if it possible due to the fact our unlocked bootloader is partially sprint or something along those lines. That is why i was hoping someone would see this and chime in with a technical explanation and then either a go for it, no, or tread with caution. When the phone was being released there was talks of a rom kitchen being established between the carriers and i was hoping that this was a part of that. Meaning that someone who Devs for the AT&T version of the SGS3 can have their rom or kernel ported to Sprint version and then the Verizon and T-Mobile variants. Idk if the kitchen is still a possibility or in the works but it would be cool to see it kernel wise considering most are running AOSP based roms.
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Click to collapse
Some kernels could very well work, same as some stock themes for sprint will work with stock roms on verizon (jellybomb domination being one of them) the issue is that some things could be carried over that may not play nice with our phones and vice versa. While it may run perfectly fine, there's a greater risk that it could break something.
I have yet to run an AOSP rom because of the IMEI issues, so i can't really comment on that, but i know if i was going to flash another carriers kernel i would make sure to make a backup first.

[Q] Best Vanilla Experience

Let me start by appoligizing, I am a newbie to ROM's etc. I did a search but all results I was getting were 2+ yrs old. I want a Nexus phone, althought tied to verizon, due to company! I am looking for a way to get that total vanilla experience on a verizon galaxy s3. I have looked at the super nexus 2.0 rom but doesn't seem to be compatible with verizon, unless I am missing something. I am looking for a Vanilla ROM, in which everything works, phone, camera etc...
Can anyone direct me to a rom that might fit this bill? Thanks in advance, and I'm sorry if this has already been discussed to death, but a search revealed 2011 era posts.

asu93 said:
Let me start by appoligizing, I am a newbie to ROM's etc. I did a search but all results I was getting were 2+ yrs old. I want a Nexus phone, althought tied to verizon, due to company! I am looking for a way to get that total vanilla experience on a verizon galaxy s3. I have looked at the super nexus 2.0 rom but doesn't seem to be compatible with verizon, unless I am missing something. I am looking for a Vanilla ROM, in which everything works, phone, camera etc...
Can anyone direct me to a rom that might fit this bill? Thanks in advance, and I'm sorry if this has already been discussed to death, but a search revealed 2011 era posts.
Click to expand...
Click to collapse
Check out the ROMs in the original android development section here:
http://forum.xda-developers.com/forumdisplay.php?f=1692
You're most likely going to want to look at CM 10.1 or the Pure Google AOSP ROM

I'm a fan of AOKP, which provides a great vanilla experience with some extra options. I like the options better than CyanogenMod.

Cauchon said:
I'm a fan of AOKP, which provides a great vanilla experience with some extra options. I like the options better than CyanogenMod.
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Thank you both, being that I'm totally new to ROMs can you recommend a ROM?

I highly recommend AOKP. Its my daily driver. Rock solid for me with leankernel
Sent from my SCH-i535 with Tapatalk 2
If I've helped, please hit the thanks button

Welcome to the forum. I suggest you read the stickies in the root section and then root your phone.
For AOSP rom I can recommend both SlimBeans and LiquidSmooth as well.
You will find all the AOSP roms are very very similar of course, some are more later or stable but it can depend a lot on the kernel and your phone.

ECrispy said:
Welcome to the forum. I suggest you read the stickies in the root section and then root your phone.
For AOSP rom I can recommend both SlimBeans and LiquidSmooth as well.
You will find all the AOSP roms are very very similar of course, some are more later or stable but it can depend a lot on the kernel and your phone.
Click to expand...
Click to collapse
I tried LiquidSmooth and liked it a lot. I wasn't able to get GPS working so I switched to AOKP.

Best fully working custom rom

I'm just looking for a fully working custom rom to put on this phone. I need everything working. THis isnt my phoen which is why im not scouring the threads myself. If anyone can help thatll be great.

Try CM10.2 which is the most stable custom ROM for this device. Also, you can try CM11 which is pretty stable too.

ameer1234567890 said:
Try CM10.2 which is the most stable custom ROM for this device. Also, you can try CM11 which is pretty stable too.
Click to expand...
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does 10.2 support wifi calling?

To my knowledge, no custom image for any phone supports Tmobile's current implementation of WiFi Calling. If someone can prove me wrong, I would personally adore it.
That said, Almost any Image can be made to support SIP and VoIP, which is essentially what Tmo's WiFi Calling is, without the ability to use your usual Tmobile mobile number.

Magamo said:
To my knowledge, no custom image for any phone supports Tmobile's current implementation of WiFi Calling. If someone can prove me wrong, I would personally adore it.
That said, Almost any Image can be made to support SIP and VoIP, which is essentially what Tmo's WiFi Calling is, without the ability to use your usual Tmobile mobile number.
Click to expand...
Click to collapse
I'm coming from the HTC G2 and for awhile I had a custom ROM with WiFi calling. Technically I think I had to install it as an addon after I flashed the ROM but it shows it's been done. Here's the original thread where it was posted: http://forum.xda-developers.com/showthread.php?t=1664106. Was able to get WiFi calling on ICS even though there was never a stock ICS ROM for the G2.
So it might be in the realm of possibilities. I do know that the G2 had a lot more dev activity though.

jgummeson said:
I'm coming from the HTC G2 and for awhile I had a custom ROM with WiFi calling. Technically I think I had to install it as an addon after I flashed the ROM but it shows it's been done. Here's the original thread where it was posted: http://forum.xda-developers.com/showthread.php?t=1664106. Was able to get WiFi calling on ICS even though there was never a stock ICS ROM for the G2.
So it might be in the realm of possibilities. I do know that the G2 had a lot more dev activity though.
Click to expand...
Click to collapse
Ok.
It's possible.
However, T-Mo pushes out plenty of updates to their Wi-Fi calling that aren't aimed at improving service; they are released to break custom implementations. The difficulty of porting and maintaining Wi-Fi calling is the reason it probably won't happen on this device.
Regardless, there is no 100% perfect custom rom that will shower you with perfect mana from the heavens above and make poo smell like cinnamon rolls.
Every rom (including stock TouchWiz) is a tradeoff. That's just life.

ameer1234567890 said:
Try CM10.2 which is the most stable custom ROM for this device. Also, you can try CM11 which is pretty stable too.
Click to expand...
Click to collapse
+1 CM10.2 stable is working great

jgummeson said:
I'm coming from the HTC G2 and for awhile I had a custom ROM with WiFi calling. Technically I think I had to install it as an addon after I flashed the ROM but it shows it's been done. Here's the original thread where it was posted: http://forum.xda-developers.com/showthread.php?t=1664106. Was able to get WiFi calling on ICS even though there was never a stock ICS ROM for the G2.
So it might be in the realm of possibilities. I do know that the G2 had a lot more dev activity though.
Click to expand...
Click to collapse
I believe this is the old implementation of Wifi calling, which T-Mobile changed mid 2012, before the release of the Relay. There's a nearly $1500 bounty posted somewhere for someone to get the new implementation working for modern phones on AOSP based images.

Magamo said:
I believe this is the old implementation of Wifi calling, which T-Mobile changed mid 2012, before the release of the Relay. There's a nearly $1500 bounty posted somewhere for someone to get the new implementation working for modern phones on AOSP based images.
Click to expand...
Click to collapse
Yeah you're right, it was the old implementation. Realized you specified the "new implementation" after I posted.

Compatible ROMs from AT&T forum?

I didn't see a thread for this (unless I'm blind, which is partially true). I saw a post somewhere linking to the Dirty Unicorn ROM in the ATT gs3 section and saw that they had loads of roms. I simply wondered how compatible some of these were with the vzwS3 before I just started flashing away... Or maybe there is a list somewhere I failed to see?

That reminds me...
On my samsung galaxy nexus I used to use a script called rom switcher (or something like that) that allowed you to flash lets say a sprint rom on a gsm phone or a verizon rom on sprint and so on. Without the need for porting.
However I'm not sure if something like this would be applicable to the s3 because of bootloader differences (nexus is unlocked ofc) and other possible hardware issues. Samsung uses unified architecture on gnexus (kernel level at least) across all three platforms. So I'm guessing the same applies to the s3 and if so that wouldn't be a problem in itself so I think the only real major issues would come from the bootloader.
If there are any devs or someone with more knowldge than i who want to see the script just let me know and I'll see if I can get a link to the thread it's in the galaxy nexus apps and themes section.
Anyway just an idea that may be helpful to at least those who are not locked down.
Sent from my SCH-I535 using Tapatalk 2

Thanks for the response! Luckily I'm not locked which is exactly why I was curious. My friend just got a Galaxy S4 i337 and I rooted/safestrapped it for him but in the process noticed lots of Verizon and Sprint roms floating around which got me curious. There's gotta be someone here with said experience right?

Perhaps you could enlist the aid of mohammed.afaneh, shapesblue, prdog or mikeman?
All those guys are good people and always helping around the forums.
I've only had the s3 for a couple months (coming from a Galaxy Nexus r.i.p.) and locked on 4.3 when I got it so not really comfortable experimenting with things just yet. But basically the script just changes some very basic things like build.prop and updater script for example but it worked very well in my experience.
Sent from my SCH-I535 using Tapatalk 2

47th_Ronin said:
Perhaps you could enlist the aid of mohammed.afaneh, shapesblue, prdog or mikeman?
All those guys are good people and always helping around the forums.
I've only had the s3 for a couple months (coming from a Galaxy Nexus r.i.p.) and locked on 4.3 when I got it so not really comfortable experimenting with things just yet. But basically the script just changes some very basic things like build.prop and updater script for example but it worked very well in my experience.
Sent from my SCH-I535 using Tapatalk 2
Click to expand...
Click to collapse
I messaged prdog. Even if I can't get a specific answer I'll gladly accept any information on the topic. I'll even test out a lot of the roms if it isn't too "unsafe" and put together a compatibility list for other VZW users.

pyrite123 said:
I messaged prdog. Even if I can't get a specific answer I'll gladly accept any information on the topic. I'll even test out a lot of the roms if it isn't too "unsafe" and put together a compatibility list for other VZW users.
Click to expand...
Click to collapse
Ports are usually only problamatic with calls and messaging. You have to use Verizon modem and maybe even RIL cause ATT don't have CDMA. Biggest problem is you need Verizon kernel which we don't have.

prdog1 said:
Ports are usually only problamatic with calls and messaging. You have to use Verizon modem and maybe even RIL cause ATT don't have CDMA. Biggest problem is you need Verizon kernel which we don't have.
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So you're saying there is no way to flash any of the roms and get them fully functioning without a supported kernel? :sadface:
I have an Aroma addiction >;O

pyrite123 said:
So you're saying there is no way to flash any of the roms and get them fully functioning without a supported kernel? :sadface:
I have an Aroma addiction >;O
Click to expand...
Click to collapse
No matter what we do we need a Kernel. Only option for now is AOSP.

prdog1 said:
No matter what we do we need a Kernel. Only option for now is AOSP.
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Click to collapse
Alright, thanks. It's a shame that companies overcomplicate things and can't all just see eye to eye. Oh well such is life. Maybe one day, when the world is taken over by Google, the world will be a happier place and things will be more simple.
[emoji16][emoji184]
Assuming everything applies to Sprint and i9300 ROMs as well?

pyrite123 said:
I didn't see a thread for this (unless I'm blind, which is partially true). I saw a post somewhere linking to the Dirty Unicorn ROM in the ATT gs3 section and saw that they had loads of roms. I simply wondered how compatible some of these were with the vzwS3 before I just started flashing away... Or maybe there is a list somewhere I failed to see?
Click to expand...
Click to collapse
Most of the AOSP ROMs for the S3 that are still being actively developed have moved to putting out one unified build that works on all US variants of the S3. They will use the tag [D2LTE] in the thread title to note that. [D2VZW] is the Verizon version of the phone. So you can use ROMs that advertise compatibility with either D2LTE or D2VZW. The only problem is that as you've seen, since development for the S3 was, for a long time, specific to each carrier's model, the various D2LTE ROMs are kind of spread around among the various forums for each individual S3 model. The LiquidSmooth thread in the AT&T forum, for example, seems to be the only one that gets updated anymore, even though that ROM is built for D2LTE now and works fine on the Verizon S3. Task650's AOKP build runs fine on our phones too and can be found in the AT&T S3 forum.
If you search all forums for the tag [D2LTE], that's a decent way to get an idea of what's out there now.
ETA: I left out something which I hope you know by now: your bootloader needs to be unlocked to use anything with a D2LTE tag. If you took either the Android 4.3 or 4.4.2 updates from Verizon and locked your bootloader, you're out of luck.

Jacquestrapp said:
Most of the AOSP ROMs for the S3 that are still being actively developed have moved to putting out one unified build that works on all US variants of the S3. They will use the tag [D2LTE] in the thread title to note that. [D2VZW] is the Verizon version of the phone. So you can use ROMs that advertise compatibility with either D2LTE or D2VZW. The only problem is that as you've seen, since development for the S3 was, for a long time, specific to each carrier's model, the various D2LTE ROMs are kind of spread around among the various forums for each individual S3 model. The LiquidSmooth thread in the AT&T forum, for example, seems to be the only one that gets updated anymore, even though that ROM is built for D2LTE now and works fine on the Verizon S3. Task650's AOKP build runs fine on our phones too and can be found in the AT&T S3 forum.
If you search all forums for the tag [D2LTE], that's a decent way to get an idea of what's out there now.
ETA: I left out something which I hope you know by now: your bootloader needs to be unlocked to use anything with a D2LTE tag. If you took either the Android 4.3 or 4.4.2 updates from Verizon and locked your bootloader, you're out of luck.
Click to expand...
Click to collapse
Thanks a lot for the tips. From my time at this forum I had kind of put two and two together and assumed that was what the tags stood for. I hadn't thought of using those tags for searching, though. And luckily I got my S3 last year when I did because my bootloader wasn't locked. And just days later I believe they released that dirty OTA