Develop Bugs

Lost 4g icon in rooted r800at

So i have an att xperia play and when I first got it i flashed the r800i generic and rooted. No big problems there but i dont have the 4g icon that i was able to see for the few hours that i had the phone and it wasn't rooted. I just have the nagging feeling that im not using the att network to it's full potential. That and im not happy that i can't bill apps to my account without the at firmware. Can i download different operator settings or flash to the north American generic to get full 4g with the icon again?
Sent from my R800i using xda premium

If you're worried you're not getting 4G speeds, try running the app "speedtest.net mobile" and it'll tell you what speed you're getting. Then just compare that to your normal 4G speed and you'll know if you're still getting 4G or not

UPDATE I flashed the name generic firmware from this forum. Booted fine but I was unable to download the network settings. Then I flashed the generic att firmware - had to go off board - and then was able to root easily using superoneclick.
Just sharing so others can learn
Sent from my R800at using xda premium

T-Mobile radio modem

Can some give me the t-mobile modem,? I m using an unlock AT&T s3 on T-Mobile network . Trying to flash t-mobile modem to see if I can get better data speed. Thanks
Sent from my SGH-T999 using xda premium

Huh? T999 is a tmobile variant isn't it?
Either way I never heard of flashing other carriers' modem on a phone
Sent from my iPhone using Tapatalk

kulzboy said:
Huh? T999 is a tmobile variant isn't it?
Either way I never heard of flashing other carriers' modem on a phone
Sent from my iPhone using Tapatalk
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I did with my skyrocket. And also the note. Both phone I flashed T-Mobile modem. I just wonder it will works the same
Sent from my SGH-T999 using xda premium

All the hardware is the same. Just a matter of software. Very much possible. i need it too. How are your t mobile speeds? Are you getting 3g or just edge?

r3a1ist said:
All the hardware is the same. Just a matter of software. Very much possible. i need it too. How are your t mobile speeds? Are you getting 3g or just edge?
Click to expand...
Click to collapse
if you're only able to get Edge speeds on the ATT GS3 even after flashing a TMo Radio, then all hardware is not the same....it would mean that the actual radio hardware is different on their respective carriers. If you're still gettin edge speeds on TMo using an ATT S3 then that means the actual hardware doesnt have the required 1700 TMo 3g band...which is what I believe to be the case, if it works and I'm wrong then awesome but until someone confirms 3g speed on the 1700 TMo band then I'm gonna assume each carriers hardware is different...also something to keep in mind, those who flashed the TMo radio on an ATT Galaxy Note have reported bad battery life.

djkinetic said:
if you're only able to get Edge speeds on the ATT GS3 even after flashing a TMo Radio, then all hardware is not the same....it would mean that the actual radio hardware is different on their respective carriers. If you're still gettin edge speeds on TMo using an ATT S3 then that means the actual hardware doesnt have the required 1700 TMo 3g band...which is what I believe to be the case, if it works and I'm wrong then awesome but until someone confirms 3g speed on the 1700 TMo band then I'm gonna assume each carriers hardware is different...also something to keep in mind, those who flashed the TMo radio on an ATT Galaxy Note have reported bad battery life.
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Click to collapse
i didn't see a difference in my battery life while i had the note. + it was unstable at times due to the galaxy s2 being a completley different device.
There is a chance the S3 uses a different radio. I unlocked a One X this week & tried to get it to work on T-mobile. It did not pick up the signal . However, there are apparently two versions of the One X one with the 1700mhz band and one without. So it's kind of hit or miss on that device.

r3a1ist said:
All the hardware is the same. Just a matter of software. Very much possible. i need it too. How are your t mobile speeds? Are you getting 3g or just edge?
Click to expand...
Click to collapse
I flashed one of the T-Mobile Rom but in my baseband didn't change it is still have AT&T modem stuck in it. I am looking for t-mobile modem to flash over it and see if my data speed is improving. Still looking for t-mobile modem. I will extract t-mobile Rom and try to pull the modem out later today. I'll keep you posted
Sent from my SGH-T999 using xda premium

I had the same problem with a Tablet from China. it only had the 850/1900/2100 band. T-Mobile needs the 1700 mhz band as indicated above and the 2100 MHZ band for 3G. I could only get Edge from the other bands in that modem on that tablet.
So unless the ATT device has the 1700 band, you can not get t-mobile 3G. There are many different modem chips with and without some of these bands.

jordan032503 said:
I flashed one of the T-Mobile Rom but in my baseband didn't change it is still have AT&T modem stuck in it. I am looking for t-mobile modem to flash over it and see if my data speed is improving. Still looking for t-mobile modem. I will extract t-mobile Rom and try to pull the modem out later today. I'll keep you posted
Sent from my SGH-T999 using xda premium
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did the t-mobile rom flash fine?

insight3fl said:
I had the same problem with a Tablet from China. it only had the 850/1900/2100 band. T-Mobile needs the 1700 mhz band as indicated above and the 2100 MHZ band for 3G. I could only get Edge from the other bands in that modem on that tablet.
So unless the ATT device has the 1700 band, you can not get t-mobile 3G. There are many different modem chips with and without some of these bands.
Click to expand...
Click to collapse
I believe the hardware allows it to use 1700 mhz but it is now simply a matter of enabling it on the phone. Waiting on OP's results before I make my purchase this weekend and thankful that he is trying it out.
Best of luck from fellow Tmobile customers who are feeling cheated by the phone price!

djkinetic said:
if you're only able to get Edge speeds on the ATT GS3 even after flashing a TMo Radio, then all hardware is not the same....it would mean that the actual radio hardware is different on their respective carriers. If you're still gettin edge speeds on TMo using an ATT S3 then that means the actual hardware doesnt have the required 1700 TMo 3g band...which is what I believe to be the case, if it works and I'm wrong then awesome but until someone confirms 3g speed on the 1700 TMo band then I'm gonna assume each carriers hardware is different...also something to keep in mind, those who flashed the TMo radio on an ATT Galaxy Note have reported bad battery life.
Click to expand...
Click to collapse
It has been confirmed that an AT&T GS2 can work on T-Mobile AWS frequencies after replacing the baseband firmware with one from T-Mobile (and ensuring the device is carrier unlocked). I would assume then that doing something similar to an AT&T GS3 should also allow it to function on T-Mobile 3G or HSPA frequencies.
The hardware between the two devices are similar except that the SOC utilized on the T-Mo variant precludes LTE. Otherwise, the modems are functionally the same.

Doesn't work for the time being, i got unkown signal and phone refused to connect to network. Enabling it to work would require more than a flash of the modem.
More than likely the ATT device does not have 1700 band.

I need someone to crack this quick, it will influence whether i return the phone. Thanks for trying.
Sent from my SAMSUNG-SGH-I747 using xda app-developers app

r3a1ist said:
I need someone to crack this quick, it will influence whether i return the phone. Thanks for trying.
Sent from my SAMSUNG-SGH-I747 using xda app-developers app
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Click to collapse
Won't work hardware not supported.

What do u base that on? The modem not working? That doesn't mean the hardware is not included. At&t's software could be programed to reject t mobile band modems.
Check this out, they're working on cross carrier compatible roms. These none at&t/touch wiz roms will eventually confirm whether it can be done.
http://forum.xda-developers.com/showthread.php?t=1735482
Sent from my SAMSUNG-SGH-I747 using xda app-developers app

r3a1ist said:
What do u base that on? The modem not working? That doesn't mean the hardware is not included. At&t's software could be programed to reject t mobile band modems.
Check this out, they're working on cross carrier compatible roms. These none at&t/touch wiz roms will eventually confirm whether it can be done.
http://forum.xda-developers.com/showthread.php?t=1735482
Sent from my SAMSUNG-SGH-I747 using xda app-developers app
Click to expand...
Click to collapse
I think the 1700 band is hidden really well if it's even there, so as of right now the hardware for the radio is not supported. Modems don't falsh over but Roms do, i am running a T-mobile rom right now on my i747. I tried flashing the modem and my phone wouldn't recognize any signal.

I dont know man. This chip was designed to be the mother of all frequencies. Then i hear the t mobile version may have a differnt chip and t mobile sayin they have no lte hardware.
Sent from my SAMSUNG-SGH-I747 using xda app-developers app

can't we figure out whether the process supports the aws band?

r3a1ist said:
can't we figure out whether the process supports the aws band?
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Click to collapse
just figured it out. mine doesn't have the 1700 band. hardware not supported i have a feeling rogers might support it though !
http://forum.xda-developers.com/showpost.php?p=27365601&postcount=82

I have a rogers phone what should i do in order to test ????

SGH-I747M from Telus

Ok, so yesterday i bought a SG3 from Telus(Im from New-Brunswick Canada, so its Telus, Bell or Rogers)... but the thing is i dont know if the kernels/recovery and roms in this section works for that model of SG3, its a SGH-I747M.... so i was wondering, if anyone knows about the hardware? Is it similar to the one from AT&T, Verizon etc? can i use the same roots/recovery/kernels etc? Thanks

Att telus same hardware different software. Interchangeable yes
SGH-I747m

Woolios said:
Att telus same hardware different software. Interchangeable yes
SGH-I747m
Click to expand...
Click to collapse
Thanks you! so that means i can use all the firmware stuff the AT&T phone uses right?

It should work. I haven't flashed any custom roms yet, but rooting works with the ODIN/CWM/Root method. I don't believe we can use the no-flash counter method since ODIN should refuse to flash that firmware to our devices (based on previous experience with the S2 LTE/Skyrocket).

I just flashed a AT&T rom, it works fine, except it says at&t everywhere -.- now im looking for a more "universal" rom or something that isnt carrier related

Are you able to toggle off LTE? How is the cellular connection stability?
Sent from my SGH-I747M using Tapatalk 2

nk_blu said:
Are you able to toggle off LTE? How is the cellular connection stability?
Sent from my SGH-I747M using Tapatalk 2
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Yeah everything seems fine, 4g connection and its stable too but like i said i get some error messages saying AT&T stuff has stopped working and at&t logos everywhere

Bell Canada LTE supported Roms

Hello;
Is Kyan rom the only rom that supports LTE on Bell Canada i747m?
I've tested a bunch of other roms and I can never get LTE speeds.

Wheemer said:
Hello;
Is Kyan rom the only rom that supports LTE on Bell Canada i747m?
I've tested a bunch of other roms and I can never get LTE speeds.
Click to expand...
Click to collapse
I'm pretty sure your modem would have to do with speeds. Not specifically the rom itself. Although I'm pretty green to the S3 still lol. Heck it could even be Bell.
Sent from my SAMSUNG-SGH-I747 using xda app-developers app

true from above, I think your modem is the most important, you need that to make your phone connect correctly. When I had my I9000 I flashed CM9 and coverage sucked because it was really for internally version of the phone and didn't cover my 850mhz here in Canada. Just flashing a new modem in CWM fixed it up. Do some searching I'm sure you can find it.

TMO rom /w LTE support

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!

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

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%2Fforum.xda-developers.com%2Fshowthread.php%3Ft%3D2561670%26page%3D7&v=1&out=http%3A%2F%2Fwww.androidfilehost.com%2F%3Ffid%3D23252070760975307&ref=http%3A%2F%2Fforum.xda-developers.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
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Click to collapse

Well then, that makes a huge difference, lol.
Sent from my SGH-T999 using Tapatalk

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

Huh I'll look into that then! Thanks!
Rishi
serio22 said:
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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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.

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?

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.

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

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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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