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phone loses cellular data settings

I am sort of at a loss. My Surround is losing it's celluar data settings every time I turn it off and boot it back up. The signal bars do no E, or G, or H or anything else. If I am not connected to wifi there is no data at all. Speaking of wi-fi, it also does not maintain most of my saved networks. The only one is does is the one at work.
I first ran into this after Mango RTM upgraded to final. I was having other issues (e.g. music search not working) and blamed it on the upgrade. At the time I WAS able to use the HTC connection setup to configure the cellular data connection. I finally did a complete wipe on it a couple of weeks ago; I flashed back to the original ROM release and let it spend the next couple of hours updating back to Mango. Everything seemed fine but in the last couple of days I have found the problem has returned. To make matters worse, I can't even seem to download the HTC connection setup app anymore.
I have tried multiple soft resets, battery pulls, booting up without the SIM and then booting up with it, etc. Anyone have any ideas on what is causing this and how to fix it? The phone is pretty useless as a smartphone without a data connection.

http://forum.xda-developers.com/showthread.php?p=17396407
Try that rom :] You need to do a RSPL / HSPL thing first;
http://forum.xda-developers.com/showthread.php?t=1195647
I suggest downgrading to a lower firmware and then doing so :] Mine does it from time to time aswell, Usually gets fixed when I--
1; get a call
2; turn wifi on or off
3; airplane mode
But even if it doesnt show the network type, It always works

SR1738NX said:
http://forum.xda-developers.com/showthread.php?p=17396407
Try that rom :] You need to do a RSPL / HSPL thing first;
http://forum.xda-developers.com/showthread.php?t=1195647
I suggest downgrading to a lower firmware and then doing so :] Mine does it from time to time aswell, Usually gets fixed when I--
1; get a call
2; turn wifi on or off
3; airplane mode
But even if it doesnt show the network type, It always works
Click to expand...
Click to collapse
Thanks. 1, 2, and 3 definitely don't fix it. It might be worth going with the custom ROM just so that it's unlocked and saves me from having to pay for the official unlock down the road sometime. One other thing is that around the same time I started getting some screen wonkiness. I would be trying to type something and the keyboard kept minimizing back to the bottom every few characters. Mainly only affected text messages though.

I decided to call AT&T to see if they might be able to force a refresh of the data settings. Since I've called them before on the problem the guy thinks it best to replace the phone. Guess we'll see what happens. May still do the ROM you suggested once I get it though.

Bleeping bleep bleep phone! Someone in a different thread suggested HTC might be able to help with an issue like this. Only solution they gave was a hard reset so I finally did that on I think it was Thurs or Fri. Everything was dandy at first. Fast forward to today and I notice this evening that my phone had lost it's settings again and once more I can't get them back. I also notice that it ate my saved wifi networks again.
I have the refurb device AT&T sent and I suppose I will go ahead and try to use it. I just hate having to set everything up...again. It's really getting old. Could my SIM card be to blame?
Haha. Going to be attending the local WP Insider Circle thing next week. Maybe I'll get lucky and win a new phone.

[Q] Weirdest thing: tethering brings my data to a grind...until I toggle it.

Hey all,
First off, this is my first thread so please forgive me in advance if I faux pas on some unwritten rule (I did read all of the written ones).
Ok, so I'm on 4.3 ML1 and have been for about a month with no problems whatsoever. However, two days ago I started noticing that my data connection was very intermittent. I called Verizon tech support and they said that it is probably an app since the phone's data ran fine in safe mode for a long time. I was told to uninstall app by app and see if that made any difference, but before I did that I tried my sneaking suspicion - it's actually the fact that I tether that does this!
Thing is, I haven't changed anything on my phone for weeks. No new apps, no updated apps, nothing. My foxfi app always ran perfectly fine for hours. So, it doesn't really matter if I tether with Foxfi (yes I have full version), or PDANet, or Easy tether; the result is the same: normal use for about 3-5 minutes followed by none or an absolute snail's grind after that until I simply toggle my 4g on and off (I used to restart the whole phone, sigh). Once I toggle the data, it works perfectly fine for another 3-5 minutes!
Anywho, the only other thing I have done is unroot my phone via terminal emulator as per this thread's OP (http://forum.xda-developers.com/showthread.php?t=2565758) since I was safe-rooted, freaked a little, and thought that might be the issue (great thread with enough clarity for a beginner like me btw) . No luck. I'm back to stock unrooted and the issue persists.
So, has anyone had any such similar issues? Any solution I may be overlooking? I have two options left if I continue troubleshooting with Verizon - a factory reset, or a replacement under warranty. Would the factory reset do it? I guess I better root again and titanium backup some of the app data I don't want to lose. Sigh.
Thanks.
p.s. Oh yes, another oddity, when the data stops working, google based services still work. So, I can run youtube or google search for hours without toggling the data both on my phone and on the computer it is tethered to; both wifi or usb. But everything else, all other web pages and apps, do not work longer than the 3-5 minutes until I toggle the data. Weird, huh?

Nearby wifi portal causes constant reboots/restarts

Hi, I am trying to get an idea of how many people this is affecting.
I am on my second T-Mobile Galaxy S6. The first unit had a hardware camera defect as well as this wifi bug. I had them replace it and the new unit's camera is good but it has the same wifi issue. Here's what happens:
When I go to an area with an "open" wifi network, a notification pops up on my screen that says "Click here to connect to null." What's strange is I have almost all wifi features off, particularly "Network notification." It should not tell me when any network is available. I also have "Allow Always Scanning" off as well as Wifi Calling disabled (not that relevant). Anyway, once this happens, I have about 2 seconds to turn off wifi or else the phone will reboot. It's a "soft" restart though, meaning it shows the Samsung and T-Mobile logo then is back on again within 5-10 seconds and fully "booted" within 30 seconds. This will keep happening until I turn off wifi.
It's not just any wifi connection that will cause the issue. I think it has to be an "open" connection that uses a portal for authentication (think universities, hotels, airports, etc). Recently, I clicked on one of the notifications (connect ot null) and saw a Cisco portal. I am not sure if it's isolated to Cisco AP's
I have found about 4 people so far that have reported this issue. I am guessing we are not the only ones. I am guessing it's a software issue.
Have you seen this?

Yes, I have the exact same issue. Sadly I dont know why it's doing it or how to prevent it. I'm located in the Netherlands and when I click login the browser directs me to a KPN Fon login page.

Stolper said:
Yes, I have the exact same issue. Sadly I dont know why it's doing it or how to prevent it. I'm located in the Netherlands and when I click login the browser directs me to a KPN Fon login page.
Click to expand...
Click to collapse
I am very confused what's causing this. Can you confirm what settings you have enabled or disabled? Wifi calling, advanced switching, always scanning, etc? I disable everything and still get it. So it seems like it's not just Cisco login pages. It's also FON. Do you have any areas in your city that have public wifi hotspots with login pages like McDonald's or Starbucks or a university? It'd be great to see if it happens at those locations too.

I don't have wifi calling, advanced switching is disabled, always scanning is on, keep wifi alive in sleep is on. I will check when in the neighborhood of public wifi spots. to see what's happening. Only solution for me now is not using wifi, but that's not very desirable. Have you contacted Samsung about the problem?

Stolper said:
I don't have wifi calling, advanced switching is disabled, always scanning is on, keep wifi alive in sleep is on. I will check when in the neighborhood of public wifi spots. to see what's happening. Only solution for me now is not using wifi, but that's not very desirable. Have you contacted Samsung about the problem?
Click to expand...
Click to collapse
Yes they told me the same things you'd expect. First they said to restart the device. Then clear cache. Then try safe mode. Then finally to do a factory restore. None of these items work. Just curious, is there any way you can easily give me a dump (plain text list) of your apps installed, in a PM? I wonder if it's something software related. I can do the same but I just need to find a tool that can do it.
Edit: I found an app called "List My Apps" in the Play Store. I can't link you because I don't have enough posts under my name. Hopefully I can send you a PM with my list to compare.

wifi null and reboot Samsung galaxy s6
I have the same problem like other guys. My S6 reboot continously when the wifi is on and I am I'm the City ( Zürich -Switzerland)
Then only solution was to switch of the wi fi.
Anybody else expierencing the same issue?
Regards

I'm having the exact same issue. AT&T Galaxy S6 in Southern California.

How do we get this fixed? It's not limited to a provider (that's good).
I already exchanged a unit for the camera issue. I think I am probably past my date for another exchange and quite frankly the first one was such a pain to go through, I'd prefer not to. Anyone have any ideas? I am guessing it's some sort of software issue. Something trips it up when the phone is near a captive portal.

I'm not sure swapping units will help. I did that but it didn't fix it sadly. I contacted SamsungNL and they told me to go to a Samsung repair center to show them the problem. I will try to do that next week. Until then, mobile data only.

Hi guys,
I have contacted Samsung UK and they told me to bring the phone back and ask for a new one. This is not normal and we need a replace.
In the meantime I have try to install FXR wifi Fix and Rescue from play store. Did a reset of my WiFi with this app and since then Its working everything ok. No more Reboots in the last 5 Hours. I was also in public and crossed a lot of open networks but did not report more this issue.
Give it a try.
Regards

damigor said:
Hi guys,
I have contacted Samsung UK and they told me to bring the phone back and ask for a new one. This is not normal and we need a replace.
In the meantime I have try to install FXR wifi Fix and Rescue from play store. Did a reset of my WiFi with this app and since then Its working everything ok. No more Reboots in the last 5 Hours. I was also in public and crossed a lot of open networks but did not report more this issue.
Give it a try.
Regards
Click to expand...
Click to collapse
Samsung UK support are idiots. Seriously, they tell you to return the device for software faults. I contacted them about the LTE signal showing incorrect in the settings, a clear software fault, they said to return the device.
Honestly, Samsung support is useless.

I think no way to stop it atm bcoz it is a software issue, we'll need to wait for an update. I think the baseband of wifi/bluetooth is still not stable, today I heavily played with bluetooth and got a soft reboot too.
Luckily, my HK firmware got no wifi calling and any bugs, my wifi is fine.

damigor said:
Hi guys,
I have contacted Samsung UK and they told me to bring the phone back and ask for a new one. This is not normal and we need a replace.
In the meantime I have try to install FXR wifi Fix and Rescue from play store. Did a reset of my WiFi with this app and since then Its working everything ok. No more Reboots in the last 5 Hours. I was also in public and crossed a lot of open networks but did not report more this issue.
Give it a try.
Regards
Click to expand...
Click to collapse
This seems to be working. I also ran it and it fixed the problem. I think this points towards a faulty wifi database or something.

damigor said:
Hi guys,
I have contacted Samsung UK and they told me to bring the phone back and ask for a new one. This is not normal and we need a replace.
In the meantime I have try to install FXR wifi Fix and Rescue from play store. Did a reset of my WiFi with this app and since then Its working everything ok. No more Reboots in the last 5 Hours. I was also in public and crossed a lot of open networks but did not report more this issue.
Give it a try.
Regards
Click to expand...
Click to collapse
Thanks for posting this. It's the first attempt at a solution I have found. I am going to have to agree with others and say that replacing your device did nothing to help solve the issue. I think its a software issue, perhaps with the wifi drivers or database. I tried running FXR but I won't know if it worked til I get near a captive portal. Keep this thread going guys. This problem is frustrating as heck.

So guys,
I am Happy. In the last week (After I ran the FXR app) looks like the problem is solved for me. No one reboot and any problem with. Null or open networks.

Got 920f model but im not sure is the wifi problem on my phone or not. Phone keep rebooting itself in my pocket. 10 reboots minimum during the day. Tryed flashing another rom but same nothing changet. Not sure its a hardware problem or software.

Will a replacement fix this issue? I'm about to do it tomorrow. But I'd rather not do it if it's not necessary.
UPDATE: I replaced the phone, it did not fix the issue. Seems like we need to wait for an update, unless I am extremely unlucky.

PHPanos said:
Will a replacement fix this issue? I'm about to do it tomorrow. But I'd rather not do it if it's not necessary.
UPDATE: I replaced the phone, it did not fix the issue. Seems like we need to wait for an update, unless I am extremely unlucky.
Click to expand...
Click to collapse
Did you ran the FXR app suggested by @damigor? That fixed it for me.

Stolper said:
Did you ran the FXR app suggested by @damigor? That fixed it for me.
Click to expand...
Click to collapse
I totally missed that post. Trying it right now. I will report back if it worked or not.
Thanks!

Stolper said:
Did you ran the FXR app suggested by @damigor? That fixed it for me.
Click to expand...
Click to collapse
I took replaced my device, but for a real camera issue, not the wifi bug. I agree with Stolpler, running the FXR app completely fixed the issue for me.
For those new to this thread/issue, let me try to explain what's going on and why a phone replacement doesn't work.
The issue is entirely software and I think what's happening is that for some reason, a small amount of us have some corrupted entries in our wireless login database. We all know that if you get a new Android phone and sign into your Google account, all your saved wifi credentials (home, work, school, etc) will be automatically migrated over. That's why you don't have to re-enter your wifi password. For some reason, one of these entries must have gotten corrupted for some reason. Another possibility is for some reason, the way the S6 expects the data/format is different than how Android normally stores it. So say you had an entry from your Nexus 5 for a hotel login. Then now that you're on your S6, it tries to read it and it doesn't like the format so it blows up.
Now, the reason why a phone swap won't work is the moment you sign in with your Google account, it will transfer over your wifi database/settings. If you get a new phone but don't login (ever) to your Google account, I bet the wifi issue would not exist.
With all that said, really, go download and try the FXR fix. It works, it really does.

loosing reception/signal on my s8+

Somehow my s8+ loosing reception all the suddenly.
phone has never been dropped.
i am loosing cellular signal all the time. no mattere where i am.
first i thought it was software problem, an did all the right things. safe mode, checking third party apps,
hard reset, an all that.
then i downgraded the room back oreo to see if it helped, no luck ;(
changing sim did NOT help either.
any suggestions? i have no warranty left on the phone as it a bit over 2 years old.

Mine is doing the same thing, even with wifi. It started after the most recent update. I have been googling, but haven't found much so I assumed that it was localized to me. I have never had connectivity issues with this phone before.
Sent from my SM-G955U using Tapatalk

I am having the exact same issue, it all happened after I updated to android 9, even if you downgrade back to 8 it doesn't fix the issue, has anyone managed to find a solution ? Like henbone11 mentioned suggested sites with fixes from Google do not work. Thanks in advance

I was thinking bad modem software? Is it possible to get a older modemsoftware onto the phone with PIE installed?

Same problem here. Have not done any mods, always accepted the official updates.
Cant make or receive calls. (sometimes can make one or two calls right after restart). I do get text message notifications about missed calls. GSM data not working (sometimes seems to work for a bit but not enough to load a page or use maps.
WiFi and Bluetooth still work for me. so I'm using the s8 with another older phone for WiFi hotspot and calling.
Have done full factory reset, uninstalled all apps aso. Nothing brings it back - phone repair shops say they haven't heard s8 having these problems.

I have the same issue.
One day after I restarted my phone, it suddenly said no network connection. I did factory reset too, didnt fix it. Changed sim cards, still error.
I downloaded a widget that was supposed to turn the cell radio on and off. Cant turn the cell radio on either

Network Connection on s8
Mihkel.ee said:
Same problem here. Have not done any mods, always accepted the official updates.
Cant make or receive calls. (sometimes can make one or two calls right after restart). I do get text message notifications about missed calls. GSM data not working (sometimes seems to work for a bit but not enough to load a page or use maps.
WiFi and Bluetooth still work for me. so I'm using the s8 with another older phone for WiFi hotspot and calling.
Have done full factory reset, uninstalled all apps aso. Nothing brings it back - phone repair shops say they haven't heard s8 having these problems.
Click to expand...
Click to collapse
Did you get any luck fixing your s8+ network problem?

no, still no network.
have done everything I can without rooting.
Tried different SIM cards and network providers - no luck.

vargens said:
Somehow my s8+ loosing reception all the suddenly.
Click to expand...
Click to collapse
Hi,
This issue is quite easy to fix. As modem performance (connectivity) is linked to model configuration. Another word for this is CSC.
It is fine to change your CSC. Download a benchmark tool to monitor your connectivity and record values and do not feel afraid to update / change your CSC.
It can take a while to find the right one for you, not it will be worth it. Don't worry.
Note: CSC changer can be easily found in XDA.
Note: a restart may be required to take the configuration into account.
Cheers
Spyrou

Hi there mate!
spyrou007 said:
Hi,
This issue is quite easy to fix. As modem performance (connectivity) is linked to model configuration. Another word for this is CSC.
It is fine to change your CSC. Download a benchmark tool to monitor your connectivity and record values and do not feel afraid to update / change your CSC.
It can take a while to find the right one for you, not it will be worth it. Don't worry.
Note: CSC changer can be easily found in XDA.
Note: a restart may be required to take the configuration into account.
Cheers
Spyrou
Click to expand...
Click to collapse
Hi.. i want to do your solution.
What benchmark tool to use? And is there a tutorial for the process?
Thank you so much for the idea.
I moved to another country and used a local sim card, worked for a couple of days and then it's suddenly no network.
IMEi still ok.
Phone still detects my number.
I've tried
resetting network setting
factory reset
Flashing latest unbranded firmware via Odin
Still no luck.
The mobile radio switch won't turn on.
Ping test fails.
Sometimes I wonder if this is a hardware issue.

spyrou007 said:
Hi,
This issue is quite easy to fix. As modem performance (connectivity) is linked to model configuration. Another word for this is CSC......
Click to expand...
Click to collapse
Why would this work? Phone worked normally before. Same country/same provider. Sometimes still connects to data network for a minute and then drops all cellular connection again.
Why would changing CSC work.
Asking because changing CSC is not easy for me and I don't see why would I need to change it if it worked perfectly before. NFC payments worked(still work) , data/voice calls worked perfectly for 2 years. Then suddenly didn't.

OPPO A12 CPH2083 no wifi mac? Experts Help Please

Just lost my MI 10 in a car accident, , still paying it SIGH. I got a deal on a used OPPO A12 that seller specifically said WIFI was not working as you try to turn it ON and it shts itself off, I had seen this behaviour when wrong roms/modems were flashed in some devices, other was just a matter of resetting network settings, so I bought it. Well, this one is not flashed, it has stock rom from TELCEL (Mexico) and it has a really small (didnt even notice until today) crack in one side of screen. so I think (I hope not) it could have fallen and caused the wifi problem at a physical level, is that possible?
Also I notice it has a recent patch, and that is my main suspicion on a bad update process. Any advice please (Bluetooth also does the same thing, switch goes back to off immediatly after trying to turn it on), I have already reset to factory defaults, reset network settings, reboot phone, turn on and off the airplane mode, nothing makes the wifi work.
PLEASE ADVICE
ColorOS V6.1.2Android9Security PatchNovember 5 2021<----- (THIS IS MY MAIN SUSPECT)hardware version: OPH2083EX_11BasebandM_V3_P10Kernel Version 4.9.117
in the status screen I see that it does not show MAC address for Wi-Fi and also does not show MAC address for BlueTooth.
can this mean that hardware is broke, or can this be due to the last patch?, and how can I try to fix/troubleshoot,
I will try to reflash the last update, would it be wise to try and rollback, is it possible? or flash some other region?