Develop Bugs

WiFi/data issues

How's it going everyone. Just left sprint for T-Mobile. Even with the problems I'm having its still better than sprint crappy network. Anyways. For some reason no matter what ROM I'm on I'm having issues where the WiFi will turn off it will go to 4g than WiFi will randomly turn back on. Or I'll have great service than randomly I'll see an E near my signal bars and it slows down for a good 5 minutes. Any idea what may be causing the problem?
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It makes no sense!!
Sent from my SGH-T999 using Tapatalk 2

Flash a different modem for signal issues.
Sent from my SGH-T999

I've done that. No luck
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In settings 》More settings
Make sure WiFi calling is disabled. Then go into Mobile Networks and change Network mode to WCDMA Only. See if that helps.
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Well if you are getting the E, that's Tmobile's network for ya. It is quite spotty. I get the same thing and goes back to 4G soon after. One of my main gripes with Tmobile.
If you do what DocHoliday said, it won't work at all. Just won't have any signal at all. If you leave it to auto, you will at least get the EDGE network.
Did this do the same thing with your old phone? If not, not sure what the deal would be besides weak radio maybe.

Try using the Llama app to force wifi on and disable the radios when around specific locations?
That's a workaround though...

JesseMT4G said:
Well if you are getting the E, that's Tmobile's network for ya. It is quite spotty. I get the same thing and goes back to 4G soon after. One of my main gripes with Tmobile.
If you do what DocHoliday said, it won't work at all. Just won't have any signal at all. If you leave it to auto, you will at least get the EDGE network.
Did this do the same thing with your old phone? If not, not sure what the deal would be besides weak radio maybe.
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Click to collapse
Its worth a shot. I had issues with staying on 4G when I first got the phone. That fixed it for me.
Spotty service depends upon your area imo. Sounds more like a network issue to me. Could be a side effect from all the refarming work they're doing on the network. Its a nationwide project so it can hapoen anywhere.
@op
If you turn off WiFi does it work as it should? If so check that WiFi calling isn't enabled and set to WiFi preferred. If it is turn it off and test, then if fixed turn it back on and try Cellular preferred.
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Dude I had that same issue until I flashed lh2 roms. Havent had that issue with lh2 roms at all.. try stocked up or wildchilds xquizit.
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For what it's worth, I had this issue yesterday out of the blue. Nearly every time I would unlock my phone, wifi would be disconnected and I'd see the 4G icon. After unlocking the phone, a few seconds later it would connect up to wifi again. And yes, this is even with wifi set to always on in the advanced settings.
I realize there could be multiple causes for this symptom, but the fix for me was simply forget the wifi network and connect up to it again and the issue disappeared since then. Hasn't happened today yet either.

Strange issue with wifi

Stock sgn2 in the upper right hand corner I have the LTE icon and wifi at the same time. Am I missing something here?
Sent from my SAMSUNG-SGH-I317 using xda premium

astang99 said:
Stock sgn2 in the upper right hand corner I have the LTE icon and wifi at the same time. Am I missing something here?
Sent from my SAMSUNG-SGH-I317 using xda premium
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Click to collapse
Yes,I noticed it with mine too..but i think it will still use Wi-fi network when you browse(i tested it with speedtest app,it used Wi-fi)

It seemed to keep saying couldnt connect wifi using mobile data on Att messaging app, it didnt seem to be using the data connection for anything else and was only sending/receiving on wifi
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I noticed mine seeming to drop from wifi when the screen is off for a while, even though I have it set to leave wifi always on.
When I would turn the screen on, it would show LTE, then LTE and wifi, then just wifi and give me the message that it connected to wifi. I also noticed the icon for the preloaded AT&T Smart Wi-fi. My assumption is that this app is causing me to drop from wifi when it shouldn't be.
I disabled AT&T Smart Wi-Fi and haven't had the problem so far today.

Jrockttu, thanks for your suggestion, it was driving me nuts. I've just picked up my Note II yesterday and UNFORTUNATELY I enabled the AT&T Smart WiFi app (and then forgot about it, of course). After that I couldn't stay connected to WiFi, the WiFi radio kept cycling on and off, it was maddening. Luckily I found this post, and after disabling the stupid app, now I can stay connected to WiFi.

Turning on Mobile Data not Working

Hi all,
I keep my mobile data deactivated whenever I'm not using it, and coming from the S3 which made it very convenient to toggle the mobile data on and off, the Note 2 has been hugely inconvenient.
The problem is that when I manually turn mobile data back on in the Settings, mobile data just doesn't turn on. The only way to get it to reactivate is to cycle in and out of airplane mode once data's been activated.
Is this a problem for anyone else, and if not, anyone have any clue why this might be happening? I've got 2 Note 2s and it happens on both.
The only thing I've done to these phones is root and flash TWRP. They are the Ting variant of the Sprint Note 2 if that might make a difference.
Any help appreciated!

punitenshu said:
Hi all,
I keep my mobile data deactivated whenever I'm not using it, and coming from the S3 which made it very convenient to toggle the mobile data on and off, the Note 2 has been hugely inconvenient.
The problem is that when I manually turn mobile data back on in the Settings, mobile data just doesn't turn on. The only way to get it to reactivate is to cycle in and out of airplane mode once data's been activated.
Is this a problem for anyone else, and if not, anyone have any clue why this might be happening? I've got 2 Note 2s and it happens on both.
The only thing I've done to these phones is root and flash TWRP. They are the Ting variant of the Sprint Note 2 if that might make a difference.
Any help appreciated!
Click to expand...
Click to collapse
43 views and not one person can say if they have the same problem? /bump

Im coming from the S3 and I miss that mobile data toggle. Anyone find a rom that has it included?

Whompasaurus 2.9 Has it.
Bizdady said:
Im coming from the S3 and I miss that mobile data toggle. Anyone find a rom that has it included?
Click to expand...
Click to collapse
Whompasaurus (currently at version 2.9) has had for the last several updates I've tried. Most of the ROMS being updated support it.
http://forum.xda-developers.com/showthread.php?t=2039564

I have lte in my area and I just turned off mobike data and turned it back on and it came right back on. Ill try it whej im in 3g as well latwr today for u and post back.
Sent from my SPH-L900 using xda premium

It has happen to me only on a few time but not consistant enough for me to worry. I do the same as you and turn it on when needed.
Sent from my SPH-L900 using xda app-developers app

It happens occasionally with LTE but more so dropping to 3G and LTE not coming back untill I toggle Airplane Mode. I toggle my Data On/Off daily and never have an issue with it not coming back on. Then again I use the data toggle built into the 15 toggle mod.
LJC Deodexed - Themed
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Yes when im in a bad lte area it takes forever for my data to switch from 4g to 3g. Very annoying as my data doesnt work but I have the 4g icon up top.
Sent from my SPH-L900 using xda premium

I also got this same problem with my Samsung Galaxy Grand Duos. I had no problem with Mobile Data for a few months...but after that.....When i trun ON Mobile Data..the icon which shows that it is connected.....does not appear....Just as the first post the only way i fixed mine was to check...then uncheck flight mode..Please help me

Loosing my modem/mind all together
I seem to keep loosing my modem on any version of jelly bomb (on the latest now 15.3) running Ma-7 currently but happens on any modem I try.
What is happening is data/call capability drops and does not come back until I re-flash a modem, and when I say drop, I mean totally dead not even able to make or receive phone calls.No 3G 4G and it shows signal bars but as soon as I hit the call button signal bars disappear.
I've tried re-flashing multiple times and still happens no matter where I am located, so I have a hard time believing it's a network problem like sprint keeps trying to tell me.(which they tell me there're working on)for like the last freggin year and a half.
I've flashed an asop rom and it seemed to be ok for the short while I tested it, but I like jelly bomb and would like to see if there is a fix for my problem and/or see if it is happening to anyone else.

LTE Connection Possible Fix

I have noticed that there are people starting to notice that that have LTE in their frequenting areas, but it's messing with their data once they leave these areas.
For me it was having issues kicking back to edge and even 4G signals would not pull any data, would simply say that I had no connection. Didn't matter whether rooted or not or which rom I was using.
Anyway,
I have discovered somewhat a fix for this issue.
Under Connections tab in Settings, click more networks, then mobile networks, then Access Point Names my Access Point Name was epc.tmobile.com.
I noticed in other forums their APN should be fast.t-mobile.com so I thought I'd give it a try and incredibly my results were pretty good. It goes in and out of LTE areas pretty smoothly in comparison to losing data altogether.
Give it a try and report back.
Thanks

I was experiencing drop of data connection for long period of time (at least 5-10 mins) every time I leave the house, losing my wifi connection. More than once it just won't connect at all for a good couple of hours. I just did a test today, messing with the APN, network operator settings and get it to connect to 4gLTE. Once and turn on and then off the wifi, I lose the data again. And it wasn't gonna come back.
The fast.t-mobile.com address seems to do the trick and I'm now immediately on 4gLTE after losing wifi. and the speed is AMAZING at 24,000kbps download and over 10,000kbps upload.
Thanks!!!

I already had that APN setting but I wasn't getting ant 4G LTE :/ must not be in my area yet. I'm in north Georgia
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With thr default (epc..) APN, I had LTE before in NYC, DC, Boston. It just happened that the connection drop was getting more and more noticeable so I had to do something about it.
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I haven't changed anything, but mine is already showing fast.T-Mobile.com, and that's the only option there.
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great find, I must have switched between 5-7 different roms trying to figure out why I'd lose data for up to 20min. after coming off wifi. Once I got reconnected to 4g I was afraid to even turn my wifi back on.

This seems to me to have just started recently, I'll have 4G but I might use the elevator at work and lose my connection, upon being back in service I'll be stuck on Edge for about 10-20 minutes before it picks up the 4G connection again.
I've been switching to Airplane Mode then back and that seemed to help but it doesn't any longer.
My APN is already fast.t-mobile.com, is there any other solution to fixing this?
EDIT: If I reboot my phone it connects to 4G immediately, and I'm using a Rooted Stock MDL Build w/ the Faux kernel.
Thank you!

MMakoto said:
I haven't changed anything, but mine is already showing fast.T-Mobile.com, and that's the only option there.
I have noticed before as well that roms default fast.t-mobile.com, but other times it would not. I could still get LTE with the epc..... but it wouldn't hold it.
Sent from my SGH-M919 using Tapatalk 2
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Saintfyre said:
This seems to me to have just started recently, I'll have 4G but I might use the elevator at work and lose my connection, upon being back in service I'll be stuck on Edge for about 10-20 minutes before it picks up the 4G connection again.
I've been switching to Airplane Mode then back and that seemed to help but it doesn't any longer.
My APN is already fast.t-mobile.com, is there any other solution to fixing this?
EDIT: If I reboot my phone it connects to 4G immediately, and I'm using a Rooted Stock MDL Build w/ the Faux kernel.
Thank you!
Click to expand...
Click to collapse
Unfortunately I do not know of any other things that might help with LTE connection. I just stumbled on this and thought I'd share what worked for me.

Can anyone with fast.tmo take screenshots of their settings for that apn. My Rom doesn't have that and I would like to manually add it in. Thanks!
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Closed Source Project said:
Can anyone with fast.tmo take screenshots of their settings for that apn. My Rom doesn't have that and I would like to manually add it in. Thanks!
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Sent from my SGH-M919 using xda app-developers app

What baseband are you guys on cause I dont have these issues on mdb baseband

hey I just want to say thanks man for discovering this.... it was a big help... I sent you a private message pretty much saying the same thing but figured I'd drop a comment on the thread too.... appreciate it
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cwalker0906 said:
What baseband are you guys on cause I dont have these issues on mdb baseband
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I'm on the MDL baseband.
I'm looking is there a way to flash the MDB baseband?

Once and turn on and then off the wifi, I lose the data again. And it wasn't gonna come back.
The fast.t-mobile.com address seems to do the trick and I'm now immediately on 4gLTE after losing wifi. and the speed is AMAZING at 24,000kbps download and over 10,000kbps upload.

Data connection lost

I been having this issue since I loaded up wicked rom on my phone. Works for 5 minutes only then loose connection, the only way seem to get connected again is through making a phone call to any... I just call my voicemail to get connected again so I don't have to annoy people! Help!!!
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redshark80 said:
I been having this issue since I loaded up wicked rom on my phone. Works for 5 minutes only then loose connection, the only way seem to get connected again is through making a phone call to any... I just call my voicemail to get connected again so I don't have to annoy people! Help!!!
Sent from my SGH-M919 using xda app-developers app
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Click to collapse
The current modem seems to *really* want to be on LTE. If you don't care about LTE you can disable it...settings - connections tab - more networks - mobile networks - change "Network Mode" to GSM/WCDMA. You'll still get HSPA+ speeds, but it should stay connected better.

Toleraen said:
The current modem seems to *really* want to be on LTE. If you don't care about LTE you can disable it...settings - connections tab - more networks - mobile networks - change "Network Mode" to GSM/WCDMA. You'll still get HSPA+ speeds, but it should stay connected better.
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Thanks man, it's just weird that the only way to get back connected is to make a phone call... I was at the time bike store yesterday and they mentioned something about updating the towers to LTE and should be over end of this summer... They said they are already ahead of sprint as in service at the moment and they are trying to be on the same page as AT&T and Verizon. I messed with the option by the way many times but didn't notice the difference yet but I will update the result on a following reply in the future. Thanks again
Sent from my SGH-M919 using xda app-developers app

Problem is solved
Haven't had any issues since starting doing what you asked me to do. Thanks!