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Sudden Disconnection from network?

So out of nowhere, my HTC Sensation no longer connects to the network. I would get roughly around 5 mbps around my house, but just all of a sudden, it stopped working. I tried rebooting the phone, and turning on/off airplane mode, and it just doesn't seem to be working. Anyone have any more tips before I try and factory resetting? Also i think I may be experiencing a bug because every time I open any app, I get a very quick glimpse of the weather instead, and then the app opens up. Thanks

What was your previous phone with t-mobile? If you don't have an "android plan" it seems that T-mobile is blocking you from data.
Check this thread: http://forum.xda-developers.com/showthread.php?t=1128335&highlight=data&page=5

I had the same problem two days ago and had to do a factory reset to solve the problem.

Previous phone was MyTouch 3g, so I'm sure I'm on an android plan
Thanks for the link, I'll check it out

Don't assume it's your phone. It's possible that service in your area is down. If you have another t-mobile phone check to see if it has reception. Next go into settings, wireless&networks, and select mobile networks. Then choose network operators and select automatically. If nothing comes up I would call t-mobile because resetting your phone.

[Q] Nexus 5 will not automatically connect to cell network

Hi All,
I've been having an issue after upgrading from a Nexus 4 to Nexus 5 where the phone will not re-connect to the home network (or will only reconnect to GSM with no data) after losing connection. This happens for example when going into an elevator or parking garage; I'll lose signal and when I get back into a signal area it won't reconnect unless I go to the "Mobile networks" -> "Network operators" menu and select "HOME" or "Automatic Registration". I'm using Straight Talk wireless with an older T-Mobile SIM (before they switched to only AT&T). I've called Straight Talk a few times to try and debug this, but the only instruction they've given me is to reset the APN and set it up again, which I've done a couple times to no avail. They claim that the SIM card is good on their end. Any ideas what might be causing this?
Thanks!

jkenny23 said:
Hi All,
I've been having an issue after upgrading from a Nexus 4 to Nexus 5 where the phone will not re-connect to the home network (or will only reconnect to GSM with no data) after losing connection. This happens for example when going into an elevator or parking garage; I'll lose signal and when I get back into a signal area it won't reconnect unless I go to the "Mobile networks" -> "Network operators" menu and select "HOME" or "Automatic Registration". I'm using Straight Talk wireless with an older T-Mobile SIM (before they switched to only AT&T). I've called Straight Talk a few times to try and debug this, but the only instruction they've given me is to reset the APN and set it up again, which I've done a couple times to no avail. They claim that the SIM card is good on their end. Any ideas what might be causing this?
Thanks!
Click to expand...
Click to collapse
It sounds like the Baseband/RIL problems I had with my old LG OP2X with non-stock roms. For me, it was fixed switching to aeroplane mode and back, it could also get stuck there, I remember it once took me half a day to get it out for I didn't want it to wipe it.
Any way, may be it's not the same but it could be fixed flashing a baseband, I think I saw a thread about it somewhere around... Also, flashing the full firmware should —if it's not a hardware issue— solve the problem without doing much research.

HI
jkenny23 said:
Hi All,
I've been having an issue after upgrading from a Nexus 4 to Nexus 5 where the phone will not re-connect to the home network (or will only reconnect to GSM with no data) after losing connection. This happens for example when going into an elevator or parking garage; I'll lose signal and when I get back into a signal area it won't reconnect unless I go to the "Mobile networks" -> "Network operators" menu and select "HOME" or "Automatic Registration". I'm using Straight Talk wireless with an older T-Mobile SIM (before they switched to only AT&T). I've called Straight Talk a few times to try and debug this, but the only instruction they've given me is to reset the APN and set it up again, which I've done a couple times to no avail. They claim that the SIM card is good on their end. Any ideas what might be causing this?
Thanks!
Click to expand...
Click to collapse
Hi Were you able to get a solution for this, My nexus 5 does not connect automatically to the network, it works only for manual search.
Please help...

Same problem here. Any solution?
I'm stuck with out any connection for the las two days. Tried removing battery, airplane mode. manual search. nothing.
Tried my line in other phone and it worked, other line in my phone and it didn't.
S4 I9500. Paranoid 4 Beta 4.

I don't have a really good solution, i reflashed my phone to stock and it did not fix the issue. I ended up switching carriers to T-mobile and haven't seen the problem since. It seems it was a SIM or network problem like i suspected

jkenny23 said:
I don't have a really good solution, i reflashed my phone to stock and it did not fix the issue. I ended up switching carriers to T-mobile and haven't seen the problem since. It seems it was a SIM or network problem like i suspected
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Click to collapse
I restored original Samsung ROM (I9505) and the same thing... i'm going to change sim tomorrow. and see what happends

ElCucoArg said:
I restored original Samsung ROM (I9505) and the same thing... i'm going to change sim tomorrow. and see what happends
Click to expand...
Click to collapse
I still couldn't make this work I'm this close to buying a new phone... any idea?

[Q] Very strange mobile data issue

Myself and my partner have recently purchased an Xperia Z3 each running Android 4.4.4 and love it but experiencing a very strange issue with mobile data.
Periodically on both our devices we lose mobile data (no 4G, H/H+ symbol) despite have a good connection. A phone restart fixes the problem but this happens all time and usually when reception is lost and then rejoined. Turning airport mode on does not fix the issue.
We are both on the UK Three Mobile network and have entered the correct APN settings.
Very strangely I have discovered the if I change just the "APN" entry to any random text then go back to mobile network settings the data instantly appears and works again for a period of time! This saves a reboot but the issue returns again once reception is lost The official setting for apn is "three.co.uk" but the issue still happens. Very strange that changing just the apn name to anything random fixes it for a bit.
I'm hoping the lollipop update fixes this issue but not holding up hope, any suggestions, or has anyone seen this issue? I suspect this a network issue but have already changed sim cards with no luck.
Also this issue occurs regardless of location and on both our identical devices. Have carried out factory resets too but no joy.

thedude56 said:
Myself and my partner have recently purchased an Xperia Z3 each running Android 4.4.4 and love it but experiencing a very strange issue with mobile data.
Periodically on both our devices we lose mobile data (no 4G, H/H+ symbol) despite have a good connection. A phone restart fixes the problem but this happens all time and usually when reception is lost and then rejoined. Turning airport mode on does not fix the issue.
We are both on the UK Three Mobile network and have entered the correct APN settings.
Very strangely I have discovered the if I change just the "APN" entry to any random text then go back to mobile network settings the data instantly appears and works again for a period of time! This saves a reboot but the issue returns again once reception is lost The official setting for apn is "three.co.uk" but the issue still happens. Very strange that changing just the apn name to anything random fixes it for a bit.
I'm hoping the lollipop update fixes this issue but not holding up hope, any suggestions, or has anyone seen this issue? I suspect this a network issue but have already changed sim cards with no luck.
Also this issue occurs regardless of location and on both our identical devices. Have carried out factory resets too but no joy.
Click to expand...
Click to collapse
I dont think device has any fault..if ur device is unlocked u can try another sim card and see if issue persists..
U can try deleting all apns and download via settings menu...amd try..

Thanks for the reply, have tried removing all apn settings and re-adding but no luck
Our phones are factory unlocked so will try and test with another network sim, if I can find one...
Wish the lollipop update would come out already so I can test with that.
Cheers

LG G5 Sim not detected only for SMS and calls

As stated I'm using the LG G5 H830 T-Mobile variant. I am getting 4G LTE data connection and everything runs well (Not in any WiFi range) Yet for SMS and calling as well as mobile hotspot I get "No USIM card' error. This happened after wiping the system and formatting data. Rebooted recovery (as per instructions on forum) then installed the stock firmware & Patch with systemless root and xposed. After this I did factor reset when just pulling the sim didn't help. Still nothing. I reflashed just the stock firmware with TWRP and SuperSU and issue is still happening. I've disabled rebooted and enabled the phone radio. SIM is in good condition and tray as well everything is SECURE and should be good to go.
I'm assuming a new SIM might be a solution. But I'm not counting on it and with Labor Day tomorrow for me I wouldn't be able to pick one up for 2 days. So here I am...hoping someone might have a fix. I know I don't have many posts on here. But I am an experienced user....just not with the more basic of problems I guess
Thanks!!

Has anyone else experienced this yet? I'm just curious...I had it fixed for a couple days. I've formatted data and done complete system wipe. Tried it resetting phone with the COMPLETE zip and TOT using LGUP. I'm receiving texts. Not calls. Not able to send either. I've activated new sim, didn't help. LG support just told me to look into warranty. T-Mobile needless to say just wanted. Sim card does show stock tmobile short code contacts but phone number shows as unknown. Hotspot won't work. I've tried setting the phone number to the sim. Nothing.
Anyways. I don't think I messed with anything, even so I've done everything to start the phone from scratch. Going to replace it, just more or less curious at this point and maybe others have had the same issue.

I believe I had the same issue as you and it was driving me crazy. I was constantly wiping data, system, etc but my phone kept giving the message "roaming indicator off" where it should show the name of the carrier. This resulted in me having LTE data and that's it- no 3g, no phone calls, etc. I couldn't even access the mobile network menu.
What ended up causing the issue was the network mode setting under wireless networks. Keep in mind at this point I'm running a patched rom which now gives more options in the network mode menu than the phone came factory with. I have an area at work where I have to switch to 3g, GSM/wcdma preferred network setting, because although I have full LTE signal, my connection goes dead. When switching back from 3g I chose the setting lte/CDMA thinking this would force my phone to stay in lte mode due to another area on an upper floor where the phone will constantly drop lte.
Anyways this resulted in my phone saying roaming indicator unavailable, the inability to make or receive phone calls, and either the mobile networks or network mode menus being grayed out. When stuck in this mode there is no way to put the phone back into the standard "GSM/wcdma/lte" mode. Even a complete reflash won't fix it. I even used lgup, which worked for maybe a day until it force closed the phone app and went back to roaming indicator unavail. I wiped every partition and even reflashed radio firmware. Nothing worked.
What ended up fixing it was using an app called v10 hidden settings which allowed me to access the network mode menu directly and re-choose the lte/wcdma/GSM setting. Incidentally on first access to this menu through the app there are only two network settings available. Once you choose a GSM setting, the rest appear.
I'm not sure if this was your issue but I hoped this helped because this took me about a week to workout.

G930u no network after updating to oreo

Hi,
I have a g930p running g930u Nougat firmware. I did an OTA update to Oreo and was not able to connect to my network after.
I'm in Canada and on Public Mobile which is owned by Telus.
I can see Telus, Bell, Rogers, and Freedom when I do a manual network search, but cannot connect to any of them.
I did some research, and I'm wondering if there are some issues with MVNO's.
My IMEI is present, so I don't think there is an issue there.
I was able to use Odin to downgrade back to Nougat. Everything works fine on Nougat.
I tried manually flashing the latest g930u oreo firmware after, and no luck. A factory reset did not help either.
Any ideas?
Thanks!

Same Issue here
Hello,
I seem to have a very similar issue.
Ever since the most recent update (to Oreo 8.0.0) my Samsung Galaxy S7 will not connect to mobile networks. The network symbol shows full four bars most of the time (sometimes the crossed out circle), however never indicators for mobile internet. I don't receive texts or whatsapp messages, neither can I send them, the browser says I'm offline. I can't be called and when trying to make calls, after a split second I get a prompt "Not registered on network" and the call ends.
Internet usage works just fine when using Wifi.
Also, the issue only occurs on default network settings: When I go to settings->connections->mobile networks->network mode and select "2G only", the phone functions as I would expect it to do. All other modes don't work.
Things I've tried without any form of success:
Flight mode on/off
Several reboots
Wiping the cache
Manually searching for network operators (keeps on scanning forever)
Resetting network settings
Resetting my phone to factory settings
Unfortunately I can't cross check my SIM-card with other phones or other SIM cards on my device. Since I've been using both for almost 2 years now, however, I don't think those are the issue.
Device: Samsung Galaxy S7 32GB
Android Version: 8.0.0
Product Code: SM-G930FZKADBT
Baseband version: G930FXXU2ERGC
Build number: R16NW.G930FXXU2ERGE
Network Provider: Mobilcom debitel (Via D2 network, Germany)
I really hope somebody has an idea for a solution, this unnecessary issue renders the phone mostly unusable :/

Hi
A UK user here, I have been experiencing some of the same issues that you have both mentioned. For me however periodically my phone will stop recieving network signal from my phone operator '3' and have completely no signal. This has been happening for a few months now and has happened since the last major update. In attempting to solve the issue, I often reset my phone multiple times to no avail and I simply have to wait until the phone starts to recieve signal again! Very frustrating!
I am not using any type of custom OS currently (or ever previously) and that was my main motivation to join this site, to jailbreak my phone and see if I can overcome these issues through custom fireware or alternatively installing older firmware where this problem did not exist.
The problem is widespread, a simple google of the issue or a visit to the Samsumg forum and you'll find plenty of users reporting the same problem, however Samsung seems to be doing nothing about it. Honestly, I am disgusted! I paid a lot of this phone on its release two years ago and I have simply been forgetten about and no one seems to care at Samsung to provide a solution or any information at all.
Best,