TMO rom /w LTE support

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rishidhar

Senior Member
Mar 20, 2007
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I'm in a real pickle. I have a AT&T (I747) S3 that's capable of LTE. I've flashed several T-mobile rom's on it and everything seems to work except I don't get an option to choose LTE in the Mobile Networks. I assume this is because T999 did not have LTE but T999L did.

Are there any roms that are touchwiz (I need wifi calling) and also support LTE?

Thanks folks!
 
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tokenpoke

Senior Member
Apr 3, 2011
606
126
Um... Why haven't you tried at&t ROMs if you don't have a t999* device anyway?

Sent from my SGH-T999 using Tapatalk
 
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rishidhar

Senior Member
Mar 20, 2007
80
20
Because AT&T roms don't have Wifi-Calling feature. I should have clarified T-Mobile is my carrier.

I was able to figure this out. I downloaded this 4.3 Stock deoxed ROM for T999L and I was able to get everything working. Now onto theming it like an S5. Unfortunately majority of the custom roms out are for the T999 and don't support LTE. http://click.xda-developers.com/api/click?format=go&jsonp=vglnk_jsonp_14033932361886&key=f0a7f91912ae2b52e0700f73990eb321&libId=e2cc1c90-f9dd-49fc-b098-d6b1401acb32&loc=http%3A%2F%2Fxdaforums.com%2Fshowthread.php%3Ft%3D2561670%26page%3D7&v=1&out=http%3A%2F%2Fwww.androidfilehost.com%2F%3Ffid%3D23252070760975307&ref=http%3A%2F%2Fxdaforums.com%2Fshowthread.php%3Ft%3D2561670%26page%3D8&title=4.3%20Update%20for%20T999L%20now%20live%20-%20Page%207%20-%20xda-developers&txt=%3Cfont%20color%3D%22Blue%22%3ET999L_4.3_UVUBMK4_deodexed_KnoxFREE.zip%3C%2Ffont%3E

tokenpoke said:
Um... Why haven't you tried at&t ROMs if you don't have a t999* device anyway?

Sent from my SGH-T999 using Tapatalk
Click to expand...
Click to collapse
 
serio22

serio22

Senior Member
Jul 1, 2012
3,215
1,134
Houston
T999 ROMs do support LTE, but you won't see the option for it, as long as you select auto it will connect to it

Sent from my SGH-M919 using Tapatalk
 
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rishidhar

Senior Member
Mar 20, 2007
80
20
I still can't seem to get LTE on this AT&T S3 (/w AWS enabled). In the same area I'm able to pickup LTE on another AT&T S4 (/w AWS enabled). I'm able to pick up Edge and HSPA+ on both.
 
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rishidhar

Senior Member
Mar 20, 2007
80
20
UPDATE: I was able to connect to LTE but I had to force the phone to use LTE Band 4 using *#BAND#. I was not able to make any calls at this point since it was the modem was running LTE only.

I then moved the modem to Automatic and the LTE remained and I was able to make some calls but on ending them, it went straight to Edge instead of HSPA+ or LTE.

The switch over between Edge to HSPA+ / LTE doesn't seem as smooth as the S4 and sometimes it just doesn't switch and sticks to Edge.

Ideas?
 
DocHoliday77

DocHoliday77

Senior Member
May 10, 2011
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HuntsVegas!!!
People have been trying to do this for a while and it is something I believe just isnt going to work. The I747 was built to use a specific set of frequencies on AT&T networks. T-Mobile uses different frequencies/bands and the I747 simply cannot make proper use of them. There's threads in AT&T forums about this. You should check them out.
 
serio22

serio22

Senior Member
Jul 1, 2012
3,215
1,134
Houston
I used an I747 before with T999 ROMs and had no problems connecting to LTE once I used the correct APN, can you please state what APN you are using?

Sent from my SGH-M919 using Tapatalk
 
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rishidhar

Senior Member
Mar 20, 2007
80
20
Ok, I have realized that this is an error caused by the AWS patch going away when I reboot. I thought this wasn't supposed to happen with I747 and only with i747M's but it seems like it's happening to my unit.

Once I have the AWS patch on, it goes quickly from E - > 4G (HSPA+ - > LTE (when available). When the HSPA+ is only available, it has a much harder time moving from E-> LTE directly.

serio22 said:
I used an I747 before with T999 ROMs and had no problems connecting to LTE once I used the correct APN, can you please state what APN you are using?

Sent from my SGH-M919 using Tapatalk
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serio22

serio22

Senior Member
Jul 1, 2012
3,215
1,134
Houston
Oh I didn't realize you were using the patch.. Well my area is refarmed for 1900 hspa+ so I didn't have to use any patches, once I put in the LTE APN it quickly picked up LTE and everything was good

Sent from my SGH-M919 using Tapatalk
 
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    serio22
    serio22
    I used an I747 before with T999 ROMs and had no problems connecting to LTE once I used the correct APN, can you please state what APN you are using?

    Sent from my SGH-M919 using Tapatalk
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