Develop Bugs

Fixed service dropping and locked LTE

I finally got LTE locked on with Telus other users confirmed Rogers, AT&T and Bell(thanks) . No service disconnections, even while on wifi.
The problem I see is conflicting settings while flashing roms/modems. This seems to be the only fix. I'm pretty stoked I figured this out because I was about to switch back to my s2x out of frustration.
This took a lot of trial and error, literally had nothing to go on and no where in particular to start. Enjoy.
MAKE SURE YOU ENABLE LTE TOGGLE IN ROM AND HAVE IT ON BEFORE STARTING.
1. Network mode(settings/wireless & networks, more/ mobile networks/ network mode) set to gsm/lte/wcdma
2.Phone setting in test mode *#*#4636#*#* set to lte/gsm
at&t / rogers should select gsm/lte/cdma in test mode
3.Recovery flash latest modem mumLL1
(at&t users flash ucdlk3)
Wipe cache/dalvik
4 . Reset. Give it a couple mins to ask the network for lte.
If you disable Lte(through toggle) and want to use 3g/H+ for battery saving, the only way I've been able to reconnect to it; is to re enable(toggle) and reset, wait a couple mins to connect.
Side note: depending on your 4g service area, it may bounce around 3g/H+ which is normal.
When you place a call it will drop to 3g (the believed reason for this is that the phone knows you won't need heavy data so falls back to ease up on the battery during calls) but will reconnect a couple mins later. Our phones are slow to negotiate Lte connections with the radio testing sockets and network stability before committing, so be patient.
Let me know if this works for you and which network. Thanks.
Modems can be found here
http://forum.xda-developers.com/showthread.php?p=34397816

Re: Fixed service droping and locked LTE
To check if it worked. Go into test mode and it should say Lte in network type.
Xda I747

So does this mean we get no 3g?
Sent from my Mind using Telekinesis!

Yes everything works. I can unselect lte in my toggles and it drops to 3g/hspa. When I re-enabled lte I noticed that I have to make sure in network settings lte/gsm/wdcma is selected and reset phone.
Xda I747

O wow lucky u I can't unselect on Att lol
Sent from my Mind using Telekinesis!

Which rom are you on? Should be up in your toggles. Basically it changes you network settings from cdma/gsm to lte/gsm/cdma. But it conflicts sometimes.
Xda I747

Its there it just doesn't do anything because all the modems on the Att S3 are Rill locked or something so we don't have the option to do it so easily
Sent from my Mind using Telekinesis!

dark_intel you are the man, i finally have 4G

btw works on at&t

countrylife said:
btw works on at&t
Click to expand...
Click to collapse
Just make sure you help spread this thread like a bad STD, this is a huge problem affecting many!

Worked for me on Bell Mobility.
Edit: Running CM10.1 (latest nightly)

No Test Mode using CM10.1 ROM
dark_intel said:
I finally got LTE locked on with Telus other users confirmed Rogers, AT&T and Bell(thanks) . No service disconnections, even while on wifi.
The problem I see is conflicting settings while flashing roms/modems. This seems to be the only fix. I'm pretty stoked I figured this out because I was about to switch back to my s2x out of frustration.
This took a lot of trial and error, literally had nothing to go on and no where in particular to start. Enjoy.
MAKE SURE YOU ENABLE LTE TOGGLE IN ROM AND HAVE IT ON BEFORE STARTING.
1. Network mode(settings/wireless & networks, more/ mobile networks/ network mode) set to gsm/lte/wcdma
2.Phone setting in test mode *#*#4636#*#* set to lte/gsm
at&t / rogers should select gsm/lte/cdma in test mode
3.Recovery flash latest modem mumLL1
(at&t users flash ucdlk3)
Wipe cache/dalvik
4 . Reset. Give it a couple mins to ask the network for lte.
If you disable Lte(through toggle) and want to use 3g/H+ for battery saving, the only way I've been able to reconnect to it; is to re enable(toggle) and reset, wait a couple mins to connect.
Side note: depending on your 4g service area, it may bounce around 3g/H+ which is normal.
When you place a call it will drop to 3g (the believed reason for this is that the phone knows you won't need heavy data so falls back to ease up on the battery during calls) but will reconnect a couple mins later. Our phones are slow to negotiate Lte connections with the radio testing sockets and network stability before committing, so be patient.
Let me know if this works for you and which network. Thanks.
Modems can be found here
http://forum.xda-developers.com/showthread.php?p=34397816
Click to expand...
Click to collapse
Ok sounds promising but unable to get my ATT phone running ROM cyanogenmod10.1 03/04 nightly into Test Mode using the keypad code provided. This does work for stock ROM phones. Do you know any other way to get into the test mode?

Haven't tried stock. Im on cm10..
Xda I747

I'm on CM10.1 not stock.
Sent from my SAMSUNG-SGH-I747 using xda app-developers app

Yeah I'm pretty sure everyone is using cm10 or aokp. Not sure if stock is having these problems. If they were I'd be on the phone yelling at Telus.
Xda I747

So let me get this right. This fixes the signal jumping around on cm10/aokp ROMs?? That's the only reason I stay on a stock based rom. I'm tired of seeing my signal jump back and fourth from 4g to 3g etc. On stock I always have a rock solid signal. It does not jump around..... Thanks in advance...
Sent from my SAMSUNG-SGH-I747 using xda app-developers app

Yes for me and others didn't even get 4g, also it would completely go out of service. Now I get steady 4g.
Xda I747

Any alternative way to get into "test mode" other than using the keypad?
Sent from my SAMSUNG-SGH-I747 using xda app-developers app

Sorry man, I tried looking around for a way. Could be the rom you're on. I know Liquid and Carbon are fine. Probably a couple more that I don't even know of, others have success with.
Xda I747

rpomponio said:
So let me get this right. This fixes the signal jumping around on cm10/aokp ROMs?? That's the only reason I stay on a stock based rom. I'm tired of seeing my signal jump back and fourth from 4g to 3g etc. On stock I always have a rock solid signal. It does not jump around..... Thanks in advance...
Sent from my SAMSUNG-SGH-I747 using xda app-developers app
Click to expand...
Click to collapse
stock lies to and shows 4G all the time, cm10 and show the truth. the s3 sets at 3g until data is needed then transfers to 4g

[Q] Bell Canada i747m losing connection

hey gang i'm running the latest aokp task650 build on my S3 I747m. Everything works awesome, except i occasionally lose my data connection. I'll notice my connection status bars are gray, and typically a reboot will fix it. I'm sure going into airplane mode and back out from that would re-establish the connection too.
my APN is set correctly, i compared it to a friends nexus which is not rooted.
Right now i'm set as pda.bell.ca
I've flashed the latest bell modem file (that i'm aware of).
Anyone have any suggestions? i'm pretty new to all of this.. not sure what to do to troubleshoot.

itrunner said:
hey gang i'm running the latest aokp task650 build on my S3 I747m. Everything works awesome, except i occasionally lose my data connection. I'll notice my connection status bars are gray, and typically a reboot will fix it. I'm sure going into airplane mode and back out from that would re-establish the connection too.
my APN is set correctly, i compared it to a friends nexus which is not rooted.
Right now i'm set as pda.bell.ca
I've flashed the latest bell modem file (that i'm aware of).
Anyone have any suggestions? i'm pretty new to all of this.. not sure what to do to troubleshoot.
Click to expand...
Click to collapse
I've been having problems lately when I have poor 4G (LTE) signal. My phone would rather hang around on the LTE network with little to no signal before it switches over to 3G. It's been doing this for a while on the Rogers network for me. I can see when I check the battery stats just how much time is spent without signal which is a lot. At work I get full bars 3G when at my desk but very poor 4G. The only thing causing me to loose signal is the poor transition back and forth between the two networks. Changing modems has absolutely no affect on this matter and I've put the APN's and network modes through the ringer with no change either. I've tried it all and nothing improved it. When I walk outside I immediately hit full bars 4G. Just when I'm inside my work and at home, I get poor lingering 4G. I wish the thresholds for when it switches over were better. I usually just turn off LTE all together which sucks but oh well.
I don't think we are the only people with this either. I've read grumblings about others noticing the same thing.
If curious, I'm running the latest CM10.1 nightly with Ktoonsez kernel on the Rogers network in Ottawa.

Interesting, that could very well cooincide with what i'm seeing. I tend to bounce from 4G to H+ or 3G, i wonder if it's trying to hang onto 4G.
Is there a way to force it to stay on 3G? that might be a good test

I was getting the same issue.
I did a factory reset and reinstalled my ROM plus GAPPs and the issue resolved itself.
I am using the latest modern right now and not my bell one. I think it's from a south American carrier, but bit 100% sure of the top of my head. But it is in the current modern thread
Sent from my SGH-I747 using xda app-developers app

[Q] weak coverage killing my battery Help?

I direct a summer camp in the summer and now that I've moved out to my summer location I have absolutely the worst data coverage at my camp. All throughout my campground my phone data switches from 4g to edge to no data depending on where I'm literally standing. I think that has been plummeting my battery life so I'm trying to find some best solutions. I'm currently running Intergalactic Rom which has giving me great battery life before I moved out here to camp.
1. Should I consider another rom such as a asop/aokp or does it matter?
2. I already tried locking my band selection to just edge but I can't receive phone calls when I do that. Is that a matter of having the right APN's? Right now my APN only shows the ATT Phone settings?
3. Does having the right combination of kernel settings, modems, etc.. make a difference too?
I would appreciate any help or feedback
Thanks

dmbrown81 said:
I direct a summer camp in the summer and now that I've moved out to my summer location I have absolutely the worst data coverage at my camp. All throughout my campground my phone data switches from 4g to edge to no data depending on where I'm literally standing. I think that has been plummeting my battery life so I'm trying to find some best solutions. I'm currently running Intergalactic Rom which has giving me great battery life before I moved out here to camp.
1. Should I consider another rom such as a asop/aokp or does it matter?
2. I already tried locking my band selection to just edge but I can't receive phone calls when I do that. Is that a matter of having the right APN's? Right now my APN only shows the ATT Phone settings?
3. Does having the right combination of kernel settings, modems, etc.. make a difference too?
I would appreciate any help or feedback
Thanks
Click to expand...
Click to collapse
Turn off your data and see if that makes a difference. There are several apps out there that will let you switch it on off through a widget. I think one was something like aon on off, just a toggle.

Gage_Hero said:
Turn off your data and see if that makes a difference. There are several apps out there that will let you switch it on off through a widget. I think one was something like aon on off, just a toggle.
Click to expand...
Click to collapse
will this affect whether i receive text messages or not?

No. Phone calls and texts will not be affected. MMS require data, though.

My 2g speed or edge is pretty sufficient. But I tested it out and I was able to place phone calls but not receive them. Is that a matter of configuring the right apn's and if i do stay on edge does that affect test messaging or mms?
Thanks again

[Q] I need help with my signal!

I have been in many many roms with my galaxy, from Touchwiz to cyanogenmode and liquidsmooth and many others, but one day, I recognize that my signal was really poor. I broke my screen and i replacement by my self i was really careful about didnt touching any other thing that was not part of the screen, but maybe, just maybe i scratch my antenna? There is anyway to check if my signal it's not good as before because of that? Also there are places where i have signal like my house and the speed is really fast, but there are also places where i have full signal and my speed is crap, and there are places were i lose my signal too frequently. I feel like my signal have been deplore slowly. Or it's just.. that sprint LTE is really bad?

first try updating your prl
next if youre on a MD4 TW rom, flash the md4 modem
also try updating your profile
if nothing works try one of the signal refresh apps from the play store
also it may be the rom
if none of the above helps its probably hardware related or it could just be that sprint is upgrading their towers and the one nearest to you is offline for the upgrade...

All AOSP based roms show's your true signal in the noti bar ( Data Bars )
TW JB has an extra signal so it looks like you have good signal but you don't.
Checking signal strength is in
About Phone > Status > Signal Strength.
Usually -75 to -99 is good to really good signal.
But if you think your actual signal is a little far-fetched. Download SpeedTestNET from
Google Play and look at your ups and downs.
My signal is around -80 dbm and my ups are 1 mb and my downs are 3-5 mbs ( It shucks :3 )
There are 3g / Wifi Speed Tweaks you can find around xda or google.
And if it has to come to it, if your on TW JB Rom, Turn off or Freeze your Sprint Connections Optimizer.
That auto connects to frequent used Networks, Wifi Terminals and towers that had the best connections for you before
and sometimes it'll connect to a good tower that's located really far ( I don't know why but I've experienced it... )
Use apps that recalibrate your Radio as well if it helps, A lot of people say it's not worth it, and sometimes it IS just a placebo
and it tricks ya but if it works it works.

Verizon PRL but only for talk.
Hey guys, I was wondering is there a way I can switch to Verizon's towers when I make a call, but only use Sprint's towers for data? didn't want to make a new thread about this in the Q&A since I can't actually post where the Sprint PRLs are yet, but I have horrible reception in my house. I roamed to Verizon's towers constantly when I switched PRLs a couple months ago and I got in trouble because I went over 300MB of data. Thank you all.

eisawi99 said:
first try updating your prl
next if youre on a MD4 TW rom, flash the md4 modem
also try updating your profile
if nothing works try one of the signal refresh apps from the play store
also it may be the rom
if none of the above helps its probably hardware related or it could just be that sprint is upgrading their towers and the one nearest to you is offline for the upgrade...
Click to expand...
Click to collapse
I am gonna try this.. but what it's profile? i really dont get it..

Ambkor said:
I am gonna try this.. but what it's profile? i really dont get it..
Click to expand...
Click to collapse
This. Menu > settings > System update

CNexus said:
This. Menu > settings > System update
Click to expand...
Click to collapse
it's there is anyway to do that on Cyanogenmode or an AOSP rom?

sadly no... but your signal might be because your on an aosp rom... they arent as stable as touchwiz roms...

There's a few unofficial ported AOSP roms that have the sprint update feature, I'm not to sure which ones but i've seen them.
They only updates profile, im not to sure about PRL. It's best to update on a TW based Rom because it's easier, it takes
awhile switching between the two just to update though.
On a stock TW JB Rom, on home screen press your menu button.
Select Settings or System Settings.
Scroll all the way down and select System Updates.
Select Update PRL.
Wait for it to be done.
Select Update Profile.
Wait for that to be done.
Reboot your phone.
Make sure your data is connected, if it's slow be patient let it take time to update Profile and PRL.
Noted that as long as your on the Rom based on what firmware it is. ICS or JB. It doesn't matter which
modem you choose, just as long as its based on one or the other.
For example. Being on an MD4 Rom you'll still be able to have 3g / 4GLTE Data with an LJ7 Modem, or
LI3 rom with an LF9 modem. Remember changing your modem YMMV, or Your Mileage May Vary, almost everyone
who switches modems that have the best stability for them they either have better data speeds. Or They're not
being dropped as often or not at all when near a tower.
For me, around my area, using an MD4 Rom, I'm using the LJ7 modem, because all the other modems I have tried either
dropped my data ( Not connected to towers even though there's one near me. ) Or I'd have to reboot my phone just to get it back.
and when im on an AOSP Rom, I'm usually using LF9, Because i've tested my data speeds on it and that's the highest out of all i've used
+ I don't get my data cut off or dropped.
@ eisawi99
Most AOSP Roms have 3G and WiFi tweaks to help with stability. But the downer part of using AOSP Roms is it doesn't get along with
trying to connect to 4G LTE, I have 4G LTE in my area, when using a TW rom it'll instantly connect when ever it's got a strong signal.
While on an AOSP Rom, It rarely ever does even if im almost sitting next to it.
Sometimes it's also the APN's that are being configured via script tweaks. I usually just remove all my old APN's and use all of sprint's
APNs when ever i can't send or recieve a text or mms, but it'll also help with data connection stability too.

Roam Control or Force Roaming?

I downloaded the roam control trail and it does not work for me. I was wondering is there a way around it or a rom that I can use to control my roam?
I have sprint and I am losing bars and reception in my own home and work place. I understand I can use a airwave, but I do not care for sprint having access to my internet. Work its impossible since its work... verizon is very strong in the area. Any help or advice would be greatly appreciated.

xvi3tsoljahx said:
I downloaded the roam control trail and it does not work for me. I was wondering is there a way around it or a rom that I can use to control my roam?
I have sprint and I am losing bars and reception in my own home and work place. I understand I can use a airwave, but I do not care for sprint having access to my internet. Work its impossible since its work... verizon is very strong in the area. Any help or advice would be greatly appreciated.
Click to expand...
Click to collapse
I too am having service latency and I installed roam control and when activate, screen is bland until the application closes unexpectedly. I am on PA rom and that may be a reason but I am looking for a force roam solution that works on the Sprint G2

Anyone? Having more and more spotty service. Would like his also. Will keep looking. Hopefully find something.