Develop Bugs

I Lost The Ability To Use Data On My Phone.

Hey guys ,
I recently flashed Rootbox on my phone,and the ROM is amazing. It has bugs here and there but one of the most frustrating one is the inability to use data. I can access WiFi without a problem,but it won't access data. I tried switching to 2G only networks,GSM/WCDMA only,LTE , I even updated the Modem ! I am at a standstill here guys and I would greatly appreciate if someone would have some helpful insights on what I should do to get data working?
Thanks!
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Check if you still have your imei number it should be 15 digits
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pvchip3 said:
Check if you still have your imei number it should be 15 digits
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Click to collapse
I have the same issue. However it is not an issue with rootbox. T-mobile is experiencing problems on their network.

pvchip3 said:
Check if you still have your imei number it should be 15 digits
Sent from my SGH-T999 using xda app-developers app
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I have it still I got worried for a second!
Sharpie603 said:
I have the same issue. However it is not an issue with rootbox. T-mobile is experiencing problems on their network.
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I really hope so, I am in New Jersey and I only have phone reception and no data. I need that for email!!
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Well I'm in New Hampshire and I've lost data as well as signal so count your blessings lmao. This sucks, how am I supposed to keep tabs on all my B's

Sharpie603 said:
Well I'm in New Hampshire and I've lost data as well as signal so count your blessings lmao. This sucks, how am I supposed to keep tabs on all my B's
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Haha stay at a Starbucks all day and use Google voice lol
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neim81094 said:
Haha stay at a Starbucks all day and use Google voice lol
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Click to collapse
Update from T-mobile Rep:
TMO is having a widespread tower outage in the New England region
Voice has been restored, data expected within the hour.

Sharpie603 said:
Update from T-mobile Rep:
TMO is having a widespread tower outage in the New England region
Voice has been restored, data expected within the hour.
Click to expand...
Click to collapse
Services have been restored.

I also have the same issue. I first thought it was a bad flash and I was reverting back to stock, but was still not getting a 4g connection. I called t-mobile last night and they transferred me to an advanced tech specialist confirming that in my area there are data issues. They said it should be fixed within 72 hours. I also live in new england.

neotoky said:
I also have the same issue. I first thought it was a bad flash and I was reverting back to stock, but was still not getting a 4g connection. I called t-mobile last night and they transferred me to an advanced tech specialist confirming that in my area there are data issues. They said it should be fixed within 72 hours. I also live in new england.
Click to expand...
Click to collapse
Might be worth check if your IMEI reads "0" or not.

Don_Perrignon said:
Might be worth check if your IMEI reads "0" or not.
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It doesn't let me access 4G though, only 3G! But its data so I will just wait for it to slowly go back to normal.
Thanks to all who helped and also shared the same problems lol :thumbup:
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neim81094 said:
It doesn't let me access 4G though, only 3G! But its data so I will just wait for it to slowly go back to normal.
Thanks to all who helped and also shared the same problems lol :thumbup:
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What does your IMEI say?
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Don_Perrignon said:
What does your IMEI say?
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It shows my IMEI. Could someone tell me their APN settings cuz I messed with my settings and I just want to make sure everything is set
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[Q] No service at work. Any help?

Ive noticed since I moved offices, that in my office building I get absolutely no service whatsoever. And there is no wifi password available to use wifi via my phone. So today as I was leaving work and finally got service again, I had 12 missed calls, 5 texts, and 3 voicemails. Is there a better modem to flash that can help? Thanks!

Not exactly. Different locations have different best modems. You just have to try them and see.
Sent from my SGH-T999L using XDA Premium 4 mobile app

Could anyone suggest an updated modem, or one they have had luck with if they are from the Chicago-land area?

You could check the map in the modem thread too. I know its a jumbled mess now, but the info can still be useful.
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yeah, i was trying to find my way through it but it is difficult so it hasnt really helped

K. Sorry bout that. Ill be redoing everything in it soon though.
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Do you think you could message me about what modem/radio might work better once that forum is sorted out? It really sucks not being able to use my phone at work for 8 hours. Thanks

I may not be able to unfortunately. I messed around a little before and got nowhere. May have to start a new map.
Have you checked T-Mobiles coverage map yet? There just may not be a signal there in the first place.
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DocHoliday77 said:
I may not be able to unfortunately. I messed around a little before and got nowhere. May have to start a new map.
Have you checked T-Mobiles coverage map yet? There just may not be a signal there in the first place.
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Click to collapse
I never had a problem with my Blaze there. Even at home with the S3 I get maybe 2 bars. Which leads me to believe its the modem. On my Blaze I had an updated modem that made data very fast.

Can I use UVLI6 which is a 4.1.1 modem on a 4.1.2 rom I am currently using? Would that be compatible? i cant remember which way compatibility goes :/

Any modem, any rom, any build. Only make sure you use the right models modems, which it sounds like you are
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itsLYNDZ said:
Can I use UVLI6 which is a 4.1.1 modem on a 4.1.2 rom I am currently using? Would that be compatible? i cant remember which way compatibility goes :/
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It will work, but last time I did that I wasn't able to connect to hspa or hspa+ only umts.. If it gives you signal though I guess its better than nothing
Sent from my SGH-T999 using Tapatalk 4

itsLYNDZ said:
Can I use UVLI6 which is a 4.1.1 modem on a 4.1.2 rom I am currently using? Would that be compatible? i cant remember which way compatibility goes :/
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Click to collapse
You can use any modem version as long as it's specifically for your phone.

itsLYNDZ said:
Can I use UVLI6 which is a 4.1.1 modem on a 4.1.2 rom I am currently using? Would that be compatible? i cant remember which way compatibility goes :/
Click to expand...
Click to collapse
And just in case for some reason you need to hear the same answer a 4th time, yes you can do that! LOL!
serio22 said:
It will work, but last time I did that I wasn't able to connect to hspa or hspa+ only umts.. If it gives you signal though I guess its better than nothing
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This is just strange... in roughly a year of doing this I think you're the first to report that happening. 4.0.4 and 4.1.1 modems have always worked on 4.1.2, and any other combo has worked as well. There are people who still use the LH2 (ics) modem because it still performs better than any other for them.
I think you may have been seeing it function normally though. When idle, its supposed to drop to UMTS to save power and bandwidth. If you check while a transfer is occurring you will see it change to HSPAP.
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Has anyone else found another modem that they now use that gives them better signal/data speeds for their Tmobile T999? My work building is a complete dead zone for Tmobile, so I am hoping flashing another modem works. Otherwise, im not sure what else I can do.

I have to refer you to my initial response here. A modem that gives better speed and signal for me, might be one of the worst for you.
Just something to consider, you probably could test 2-3 different ones each day at work. Maybe more. If your main issue is signal, then flash, check service, if none then flash another right away. I could probably flash 5 different ones on a 15 min break if I was only looking for improved signal. Might be a better way than waiting for someone to tell you what worked for them, then testing only that the next day. Its your phone and your time though, so its your call. Just tryin to help
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DocHoliday77 said:
I think you may have been seeing it function normally though. When idle, its supposed to drop to UMTS to save power and bandwidth. If you check while a transfer is occurring you will see it change to HSPAP.
Sent from my SGH-T999L using XDA Premium 4 mobile app
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Nope I know all about that.. it would never get to hspa, always umts, ran it for days and as soon as I switched to a jb modem I got hspa back
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serio22 said:
Nope I know all about that.. it would never get to hspa, always umts, ran it for days and as soon as I switched to a jb modem I got hspa back
Sent from my SGH-T999 using Tapatalk 4
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So weird....figured you would know, but wasnt certain. Still, never heard of one doing that. Finicky huh?
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I use the UVMD5 modem and my signal is strong but my battery dies faster...

DocHoliday77 said:
So weird....figured you would know, but wasnt certain. Still, never heard of one doing that. Finicky huh?
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Yeah it is weird.. I tried with both touchwiz and aosp with the same result
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[Q] Enable LTE access on T-Mobile's network

I have an AT&T SGH-I747 running CM11 that I have unlocked and using on T-mobile's network. Unfortunately though I can only access edge and I would like to be able to acces 3g, 4g, or LTE. How would I go about enabling this on my phone? Any help is appreciated.

a sandwhich said:
I have an AT&T SGH-I747 running CM11 that I have unlocked and using on T-mobile's network. Unfortunately though I can only access edge and I would like to be able to acces 3g, 4g, or LTE. How would I go about enabling this on my phone? Any help is appreciated.
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Seems that the problem could be on the APN... Search for them it should be something like fast.t-mobile.com
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TopoX84 said:
Seems that the problem could be on the APN... Search for them it should be something like fast.t-mobile.com
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I have tried several different APN's and none have worked/given me anything more than edge.

a sandwhich said:
I have tried several different APN's and none have worked/given me anything more than edge.
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Click to collapse
My tmobile APN settings... Note - I have an unlocked AT&T HTC ONE
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TopoX84 said:
My tmobile APN settings... Note - I have an unlocked AT&T HTC ONE
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I have tried that one out and nothing has changed. Still stuck on edge. Thanks for the suggestion though.

I used to work for t-mobile and that's the LTE APN...
check on their website the LTE coverage areas around you.
Make a backup of your device and attempt a factory reset.
there were some devices I worked with that the factory reset worked like a magic trick.
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TopoX84 said:
I used to work for t-mobile and that's the LTE APN...
check on their website the LTE coverage areas around you.
Make a backup of your device and attempt a factory reset.
there were some devices I worked with that the factory reset worked like a magic trick.
Sent from my HTC One using xda app-developers app
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I can't really do a factory reset, as I am currently running CM11 and I was previously on ATT. My friend on Tmobile get's LTE coverage here so I would assume I would be capable of that as well. Or at least get 3g coverage.

a sandwhich said:
I can't really do a factory reset, as I am currently running CM11 and I was previously on ATT. My friend on Tmobile get's LTE coverage here so I would assume I would be capable of that as well. Or at least get 3g coverage.
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I read some old topics where upgrading TWRP or CWM to the latest and 're-flashing was solving the LTE issue this was about 3-4 months ago
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TopoX84 said:
I read some old topics where upgrading TWRP or CWM to the latest and 're-flashing was solving the LTE issue this was about 3-4 months ago
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Hmmm, ok. I have the second to most recent CWM and I reflashed to CM11 again just this morning. Still don't have access.

Cannot lock on to a 4G signal on my SM-N900T

Hi
So I have a T-mobile unlocked SM-N900T that I'm currently using in London. I'm on Lycamobile and want to try their 4G network but for some reason my phone just will not connect to LTE. 3G works fine but that's as far as it will go.
I've been able to use 4G in India on the same phone so I know it does work, but for some reason it just wont connect here. I've tried the *#2263# service menu and selecting LTE -> ALL just gives me the no signal / network icon.
Have tried resetting, pulling out the battery and SIM but nothing seems to work.
Has anyone had these issues or any suggestions?
Oh - phone is Unrooted and running the latest KK update.
Any help or advice is graciously accepted. Cheers!

They just might be using a band for LTE that the phone doesn't have/support.
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Thanks, shouldn't this phone be able to handle the various bands though?
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A331709 said:
Thanks, shouldn't this phone be able to handle the various bands though?
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It handles a bunch of them, but not all. I'd look up the band their service uses for 4G, and see if it's compatible with your phone.
Sent from my SM-N900T using Tapatalk

Cheers sir. I'm on the phone with them now and they don't seem to know! What are the usual bands that would normally be used in London though?
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A331709 said:
Cheers sir. I'm on the phone with them now and they don't seem to know! What are the usual bands that would normally be used in London though?
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Click to collapse
Find a phone that they sell and look up spec's and compare.
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Thanks Andrew. I'll give that a go. They've called me a few times but keep reading from the same script. Was promised a call back on Sunday, but nothing and its Tuesday already!
They don't offer contracts as they are only PAYG but let me look up specs for O2, as they piggyback their network.
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Ok. ..so it would seem that the tmobile phones operate on different lte bands. So I've attempted to flash an international rom on this phone and as the Eagle eyed will note, this was done successfully. I should therefore have an international modem etc now? But I still can't connect to 4G! So does this mean that this is a device (actual hardware) issue or can this be sorted by flashing a modem that allows me to connect to all bands?
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Lock
XxLostSoulxX said:
It handles a bunch of them, but not all. I'd look up the band their service uses for 4G, and see if it's compatible with your phone.
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Thanks for this post. Its very helpful for me.

Just checking if anyone has any ideas. Thank you.

It handles a bunch of them, but not all. I'd look up the band their service uses for 4G, and see if it's compatible with your phone.

jacqueline robert said:
It handles a bunch of them, but not all. I'd look up the band their service uses for 4G, and see if it's compatible with your phone.
Click to expand...
Click to collapse
Ummm...not trying to be a ****, but why would you repeat a previous post?
Can anyone please advise if flashing a new modem will sort this out for me? I've already tried Knox so may as well give it a try. Suggestions and expert advice please?
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Posted in error

LTE bug

Hi I seem to have a problem getting LTE. I'm using a galaxy s3 i747m on Fido and I'm using stock Rogers ROM. I have a problem with LTE. I used to get it everywhere most of the time but it now only works once in a while. When I do finally get LTE it only works 30% of the time. I have full signal LTE but it doesn't load any webpages or anything. Once and a while it does though. I have tried bootloaders, modems, different Roms and I can seem to solve this problem. Does anyone know how I can fix this?
Thanks. I need my stable LTE back.
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Anyone?
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By modems do you mean basebands?
Have you look into your Access Point settings and preferred network type?

Yes by modems I mean basebands. My network type is LTE,3g, 2g. My APN is right. I can get LTE but when I do nothing loads at all. I have tried different Roms, different modems, different kernels and nothing seems to work. I did have LTE that worked before though.
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pjcordi said:
Yes by modems I mean basebands. My network type is LTE,3g, 2g. My APN is right. I can get LTE but when I do nothing loads at all. I have tried different Roms, different modems, different kernels and nothing seems to work. I did have LTE that worked before though.
Sent from my SAMSUNG-SGH-I747 using XDA Free mobile app
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When did it stop working? Do you remember what was done to the phone?
If nothing particular was done before that happened, you might wanna give Fido a call so they can check your connectivity and perhaps get a new sim card.

Well it stopped once flashed aokp ROM. I have a cut some card so that could be the cause unfortunately. I'll try a new simcard and see if that fixes it. I might also try flashing back to complete stock but I'm not too sure if that would help at all. I remember having LTE as soon as I turned it on and now it never turns on.
Thanks for the info!
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pjcordi said:
Well it stopped once flashed aokp ROM. I have a cut some card so that could be the cause unfortunately. I'll try a new simcard and see if that fixes it. I might also try flashing back to complete stock but I'm not too sure if that would help at all. I remember having LTE as soon as I turned it on and now it never turns on.
Thanks for the info!
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You can backup your stuff, fully wipe and go on from there. Worth giving it a shot before changing your sim card.

I actually swapped the Sim card and that didn't seem to work. I'm just going to go back to complete stock and see if that works.
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I went back to stock and I still can't get let. Do you think it would be a good idea to change my flash counter back to zero? Nothing seems to be work and I know my phone doesn't have a problem. It has to have something to do with what I'm flashing. Any other ideas?
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+1 I'm on rogers I'm having the same problem :/ maybe its carrier related. I flashed the 4.4.2 rom then odined back to stock, thats when it started. IMEI seems intact aswell. Modem is good. Any ideas?

R5R said:
+1 I'm on rogers I'm having the same problem :/ maybe its carrier related. I flashed the 4.4.2 rom then odined back to stock, thats when it started. IMEI seems intact aswell. Modem is good. Any ideas?
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I have literally tried everything lol. I think it has something to do with our phones picking up the wrong signal. I live in Mississauga Ontario and I get LTE in the middle of the city but it doesn't connect at all. All it does is take forever to load a page and times out.
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So I fixed the issue. I added another APN to my settings. So I have two ltemobile.apn for fido. I turned off the phone removed the sim. Turned the phone back on without the sim and entered service mode *#2263# and I put it to LTE all in the settings. I then turned the phone off and turned it back on with the sim and lte is working and my speeds are back. After that was all done I entered back to service mode *#2263# and put the network back to automatic all and now the phone automatically connects to LTE when I want it to.
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