Develop Bugs

Reboot phone for LTE?

So I'm at school where fortunately we have lte, but lately my phone only connects to 3g unless I reboot while in campass. But even after class I go back outside and have to reboot again to connect to lte. Anyone else have an issue like this???
Sent from my SPH-L710 using xda app-developers app

I'm having the same issue.
Full LTE available at work. Some days, it's stays on 4G throughout my entire shift. Sometimes when I use my phone for daily tasks such as web/sms/calls it drops off to 3G and stays there til I reboot then 4G comes back again. Strange.

Are you running CM or a TW ROM?
Sent from my GT-P3113 using xda app-developers app

nope, all stock

mooney1184 said:
nope, all stock
Click to expand...
Click to collapse
Is your Sprint Optimizer on? Also you might get more responses asking in the LTE thread in the stickies in General.
FNM

mooney1184 said:
nope, all stock
Click to expand...
Click to collapse
And, of course, you are running the latest LG8 firmware?

CLOSED
Ask in the LTE thread instead

Sim Unlock - works all *ALL* GSM GS3 and Note 2

From this thread http://forum.xda-developers.com/showthread.php?t=2014982
Just dial the following keys *#197328640#
Main Menu > [1] UMTS > [1] Debug Screen > [8] Phone Control > [6] Network Lock > Options [3]Perso SHA256 OFF > (after choosing this option, wait about 30 seconds, then go back one step by pressing the Menu button then select Back, now you are in [6] Network Lock then choose [4] NW Lock NV Data INITIALLIZ ..... wait for a minute then reboot your phone... enjoy!!!
just tried it and it works like a charm!

Just tried and got the following message after running USSD code: "Unable to process this request"

cccheel said:
Just tried and got the following message after running USSD code: "Unable to process this request"
Click to expand...
Click to collapse
You must be on 100 percent stock.
Interesting, I might give this a try.
Sent from my SGH-T999 using Tapatalk 2

Thanks! Worked like a charm! Coworkers phone was on stock ROM, stuck a ATT sim and made a call. No data but that's probably a APN thing

Works! Got link from slickdeals thread. Tried att sim.

elesbb said:
You must be on 100 percent stock.
Interesting, I might give this a try.
Sent from my SGH-T999 using Tapatalk 2
Click to expand...
Click to collapse
I'm running FrostyJB v11.
The #932# USSD code doesn't work for me, either.

Conformed working also shows proof of supported LTE bands.

Worked like a charm, running Frosty JB v9.

To all the people that are getting the following error and also using a TouchWiz ROM:
USSD Code Running...
Unable to Process Request
When you enter the *#197328640# code into the keypad, make sure you include the * (asterisk) in the front.
***EDIT: I performed this on my SGH-T999 (T-Mobile) and someone else's SGH-I747 (AT&T), both running absolutely STOCK, then switched our SIMs, and BOTH phones are working perfectly with the other's SIM.***

Worked perfectly on Frosty JB V11. Tested with AT&T sim and I could make and receive phone calls. Will test data later today.
Sent from my SGH-T999 using xda premium

On ParanoidKangDroid here ... I get "Connection problem or invalid MMI code."

pgg285 said:
On ParanoidKangDroid here ... I get "Connection problem or invalid MMI code."
Click to expand...
Click to collapse
You have to be stock or running a ROM based off of stock like Frosty or other ROMs based off Stock. ParanoidKand, CM10, AOKP, those are all AOSP ROMs which dont have the T-Mobile USSD codes embeded in them.
Its simple, create a nandroid, flash Frosty(easier than odining back to stock) apply this tweak and then restore your nandroid. Your unlock should stay as its not ROM dependent. (Its exactly the steps im about to do in a couple of minutes after downloading frosty )

Seems like workd on my wicked rom 2.1, since i am able to run all those codes.
But how do i checked if it worked? I dont have other sim
Sent from my GT-N8013 using xda app-developers app

bikrame said:
Seems like workd on my wicked rom 2.1, since i am able to run all those codes.
But how do i checked if it worked? I dont have other sim
Sent from my GT-N8013 using xda app-developers app
Click to expand...
Click to collapse
Another SIM is the only way to make sure it's 100 percent unlocked. Any SIM will work.
Sent from my SGH-T999 using Tapatalk 2

flak0 said:
Conformed working also shows proof of supported LTE bands.
Click to expand...
Click to collapse
I'm not sure how this could be any proof of LTE support, it just proves that a GSM phone from T-Mobile can talk to another GSM network provider.

Sweetttt worked like a charm. Just popped in my sisters I phone sim card from att and it worked on my t mobile s3 thanks
Sent from my SGH-T999 using xda app-developers app

Here's a speed test I ran with my s3 using an att sim card
Sent from my SGH-T999 using xda app-developers app

I saw this thread literally 5 minutes after I paid for an unlock code. Damn you people!

plat_ said:
I'm not sure how this could be any proof of LTE support, it just proves that a GSM phone from T-Mobile can talk to another GSM network provider.
Click to expand...
Click to collapse
God I hate how people don't do their research before speaking. See below for images of what I was referring to

flak0 said:
God I hate how people don't do their research before speaking. See below for images of what I was referring to
Click to expand...
Click to collapse
Don't get saucy with me, an explanation alone would have been just fine.
Thanks anyway.

[Q] LiquidSmooth RC8 Problems

So I downloaded and flashed the LiquidSmooth that i got from galaxys2rootdotcom since I couldnt find any downloads here.. Im on android 4.1.2 Of course, running mod version Liquid-JB-v2.0-RC8 and kernel [email protected] #1.
Now to the problems, The main one is my data its constantly switching from H+ down to H then back to 3g Then H, H+. Tried switching the network mode and that didnt work went into my apn settings and changing the protocol from Ipv4 to ipv4/ipv6 that didnt work either, keep in mind i unlocked my phone and now running off straight talk via the at&t sim.
Second is the gps, tried going to maps and getting directions and it wouldnt show my location.
Third is the calling, when i call people they told me it sounds like im in a tunnel. So its probably echoing.
Hopefully I can get some answers and maybe help others who have the same problems.

TwoStax said:
So I downloaded and flashed the LiquidSmooth that i got from galaxys2rootdotcom since I couldnt find any downloads here.. Im on android 4.1.2 Of course, running mod version Liquid-JB-v2.0-RC8 and kernel [email protected] #1.
Now to the problems, The main one is my data its constantly switching from H+ down to H then back to 3g Then H, H+. Tried switching the network mode and that didnt work went into my apn settings and changing the protocol from Ipv4 to ipv4/ipv6 that didnt work either, keep in mind i unlocked my phone and now running off straight talk via the at&t sim.
Second is the gps, tried going to maps and getting directions and it wouldnt show my location.
Third is the calling, when i call people they told me it sounds like im in a tunnel. So its probably echoing.
Hopefully I can get some answers and maybe help others who have the same problems.
Click to expand...
Click to collapse
Download Rc7 for hercules it's better than 8 or 9. Trust me no problems at all.
Sent from my SGH-T989 using Tapatalk

Can I use the same kernel?
Sent from my SGH-T989 using Tapatalk 2

TwoStax said:
Can I use the same kernel?
Sent from my SGH-T989 using Tapatalk 2
Click to expand...
Click to collapse
Stock, nibbles ,kko, lightning zap they all work on liquid 7. I use kko myself and it runs great , smooth, no echo etc.

Where can I get kko? I tried searching but no luck
Sent from my SGH-T989 using Tapatalk 2

TwoStax said:
Where can I get kko? I tried searching but no luck
Sent from my SGH-T989 using Tapatalk 2
Click to expand...
Click to collapse
Check your pm i sent u a link to the kko12 kernel . I use it also with Aokp m1 its great.
Sent from my SGH-T989 using xda premium

As for the call echo have you tried enabling nose suppression in the phone app settings?
Posted from my Galaxy S II X.

[Q] No radio service after Jedi X-9 flash

I have a Samsung Galaxy Note II - AT&T version.
I flashed Jedi X-9's rom and noticed I couldn't connect to the Play Store nor the Internet.
I wasn't able to send SMS but could call and receive calls.
http://forum.xda-developers.com/showthread.php?t=2005141
I then flashed the atti317ucalj2modemfixed, rebooted - same thing.
http://d-h.st/QCG
Is anyone else having this issue?
Please let me know!
Thanks,
- J.

I had the same issue. Try flashing over to the k7 modem. Its seems pretty good for alot of users. I prefered the j2 that cam with it because its seems more stable for me.
Sent from my SGH-I317 using xda premium

jdc5 said:
I had the same issue. Try flashing over to the k7 modem. Its seems pretty good for alot of users. I prefered the j2 that cam with it because its seems more stable for me.
Sent from my SGH-I317 using xda premium
Click to expand...
Click to collapse
Thanks for the reply.
Is that what you did, was switch to the K7 modem?
Thanks!

Yeah. I actually backed up when i had the j2 and flashed the k7. For me, it wasnt too stable so i went back to the j2. But maybe you might have better luck with the k7 depending on where you live.
Sent from my SGH-I317 using xda premium

jdc5 said:
I had the same issue. Try flashing over to the k7 modem. Its seems pretty good for alot of users. I prefered the j2 that cam with it because its seems more stable for me.
Sent from my SGH-I317 using xda premium
Click to expand...
Click to collapse
jdc5 said:
Yeah. I actually backed up when i had the j2 and flashed the k7. For me, it wasnt too stable so i went back to the j2. But maybe you might have better luck with the k7 depending on where you live.
Sent from my SGH-I317 using xda premium
Click to expand...
Click to collapse
Awesome, I'm flashing it now. - I'll let you know how it is.
EDIT: No Dice. the k7 did not work. :*(
Also, it seems the Jedi X-9 rom doesn't like my SanDisk 64gig class 10 card.. doesn't read, nor mount

have you confirmed you APN settings are entered correctly? these settings allow you to connect to data, SMS, MMS, etc. i'd also confirm your IMEI is still present.

cortez.i said:
have you confirmed you APN settings are entered correctly? these settings allow you to connect to data, SMS, MMS, etc. i'd also confirm your IMEI is still present.
Click to expand...
Click to collapse
I don't think I had to configure any APN settings. I did connect to my local router.
I see an IMEI preset, dBm, signal strength.
I'm thinking of just trying a new rom.

PLAGWEZ said:
I don't think I had to configure any APN settings. I did connect to my local router.
I see an IMEI preset, dBm, signal strength.
I'm thinking of just trying a new rom.
Click to expand...
Click to collapse
Connecting to your router has nothing to do with your APN. (If that's what you were inferring). Did you at least confirm your APN settings are there? With some ROMs you might have to manually add them.
Sent from my GN2 via Taptalk

Try this apn to see if it works
http://forum.xda-developers.com/showthread.php?t=2021401
Sent from my SGH-I317 using xda premium

[Q] d2usc - 4G issues

Hey all, I'm at my wits end trying to figure out what's going on with my phone/service. First off I hope this is the correct forum since none of them officially address the US Cellular version of the S3.
So what is happening is that my device seems to only want to connect to 3G. I am running the latest nightly for CM 10.1. It all started last week while I was in the twin cities on data roaming for a few days. On my drive back to Wisconsin I notice I would go in and out of 4G service.. by the time I hit home I was on solid 3G service. This was last Friday. I knew there was some work going on the towers in the area as my brothers 4G service started working on Sprint. I just assumed it was something to do with that.
By Sunday and still on 3G, I called tech and they did everything under the sun to try to get me back on 4G to no avail. They ended up sending me a new phone. When the new phone arrived on Tuesday I did a factory reset on the old phone just to clear everything before sending it to them and I noticed it went back on to 4G. This was on the stock ROM, rooted still.
So I switched the phone over to the new one and sure as hell, comes up in 4G. I replaced the recovery and restored a backup I had.. phone pops up.. 3G. :crying:
I did a factory reset a few times and nothing.. still would only come up in 3G mode. I then restored a backup I had for the stock ROM and what do you know.. 4G. Flashed a fresh download of the stable 4 snapshot.. 3G.. then I did a factory reset and what do you know .. 4G.. reboot the phone.. back on 3G.. Tried AOKP.. 3G..factory reset.. 3G.. Back to CM 10.1 nightly.. 3G.. factory reset.. 4G.. reboot.. 3G.
I cannot figure out what the hell is going on.. it clearly isn't hardware as it's now happened on two phones. I thought it might have had to do with being on data roaming for a few days so I waited until the data billing cycle finished (the 6th) but no luck.
I'm at wits end.. I will try anything at this point to get it working again with CM/AOKP.. doesn't matter.. just want my 4G back!

Your phone does not have 4G, It has HPSA.
On AOSP/AOKP, your connection will show up as 3G until it's being used. Let's see some speedtests.

Don't go by what it says in the ststus bar. What does it say inder Settings > About Device > Mobile Network type?
Now go start a large download, like a rom or something. While its downloading check again and post what you see.
Sent from my SGH-T999L using xda premium

Speeds
Thanks for the quick responses guys..
First thing was my status bar was showing 4G for about a year.. it was just recently I started having the issue. I used to get about 20Mb/sec down and now I'm getting about 800Kb-1.5Mb. It's clearly much slower than it was.
And the network type is CDMA - EvDo rev A:6

Try going under Settings, More Settings, Mobile Networks, and try a different network mode.
Sent from my SGH-T999L using xda premium

Its selected as LTE/CDMA/EvDo. The only other option is CDMA/EvDO. I think it's set correctly.

What about Network Operators? Have you tried checking or trying a different one?
Sorry, I just don't know much about the usc model.
What is the model# btw.
Sent from my SGH-T999L using xda premium

DocHoliday77 said:
What about Network Operators? Have you tried checking or trying a different one?
Sorry, I just don't know much about the usc model.
What is the model# btw.
Sent from my SGH-T999L using xda premium
Click to expand...
Click to collapse
Not sure what you mean by network operators but the CDMA subscription is set to RUIM/SIM (which it should be) and the System Select is on Automatic and not Home Only.
Model is SCH-R530U

Under mobile networks you can manually search for and then select an operator.
Judging by your model number, you will likely find more and better help and probably others with your phone in the Verizon forum. (Possibly Sprints, but most likely Verizon)
Sent from my SGH-T999L using xda premium

Thanks. I think I found the answer.. some code in CM 10.1 was causing the NV to lose it's information. A code change was put in to prevent that from happening.. I just need to go back to stock and flash back to CM.
Thanks for the help guys!

DruKe said:
Thanks. I think I found the answer.. some code in CM 10.1 was causing the NV to lose it's information. A code change was put in to prevent that from happening.. I just need to go back to stock and flash back to CM.
Thanks for the help guys!
Click to expand...
Click to collapse
Everything I've read involves going back to stock, factory reset, and reflashing. Is there any way to resolve this without reverting to stock? Or is that the only way? - Does it need to be unrooted? And also, one thing I was curious about, I have a stock backup, would flashing that, and then reflashing to a current CM backup do anything, or does it need to be a clean flash?

I would go totally back to stock and start over. It wouldn't even take more than an hour to do everything.
Sent from my SGH-T999 using Tapatalk 4 Beta

Yup, if you're having problems, taking shortcuts often result in more problems and more time involved than just starting over clean.
Sent from my SGH-T999L using xda premium

DocHoliday77 said:
Yup, if you're having problems, taking shortcuts often result in more problems and more time involved than just starting over clean.
Sent from my SGH-T999L using xda premium
Click to expand...
Click to collapse
I was having the same exact issue on CM10.1 RC5 -- called US Cellular and eliminated everything but CM causing the issue. Flashing back to an earlier version of CM, trying RC2 first.

Do you have the SCH-R530U? If so, see my quoted post below.
DocHoliday77 said:
Under mobile networks you can manually search for and then select an operator.
Judging by your model number, you will likely find more and better help and probably others with your phone in the Verizon forum. (Possibly Sprints, but most likely Verizon)
Sent from my SGH-T999L using xda premium
Click to expand...
Click to collapse
Sent from my SGH-T999L using xda premium

DocHoliday77 said:
Do you have the SCH-R530U? If so, see my quoted post below.
Sent from my SGH-T999L using xda premium
Click to expand...
Click to collapse
I do have a SCH-R530U -- tried looking around for info about the SCH-R530U and 4g, didnt find anything. Do you have a link? Thanks!

Verizon has their own separate forum and you can get to it from the main forum page. Go into q&a and use the search this forum searchbox.
I'll try to get the link in a bit. Bout to leave for a while though.
Sent from my SGH-T999L using xda premium

Went the revert to stock and reflash route. Issue is resolved. I did have to do it twice, as after the first reboot with RC5, I lost 4G again, skipped it and am running the 6-19 Nightly and have had no further issues! Thanks for your help. You guys are awesome!

jotchua said:
I do have a SCH-R530U -- tried looking around for info about the SCH-R530U and 4g, didnt find anything. Do you have a link? Thanks!
Click to expand...
Click to collapse
Here are the search results:
http://forum.xda-developers.com/search.php?searchid=191901439
Sorry i cant do more right now.