Mobile Data won't connect after WiFi use? - Samsung Galaxy S7 Questions and Answers

I've seen this problem now about three times. At home only, I'll be on WiFi and then leave the house and will have to force airplane mode on/off to get the mobile data to work again.
I haven't seen the same problem at work.
Any suggestions?
Att branded phone with various things disabled using package manager.
Sent from my SAMSUNG-SM-G930A using Tapatalk

I have the same problem...
SM-G935FD

Same problem, many others on android-hilfe.de experiencing it as well. Emergency calls only for me at least 9x a day. This is really ruining an otherwise completely fine experience.

slind said:
Same problem, many others on android-hilfe.de experiencing it as well. Emergency calls only for me at least 9x a day. This is really ruining an otherwise completely fine experience.
Click to expand...
Click to collapse
i have the same problem after 370 hours of function "emergency call only" appear and have to use airplane mode then switch back everything is normal, this bug is really annoying, i have submitted the bug to Samsung maybe they will fix this software problem already change one nano sim
maybe some has a fix

Related

[Q] Network Dropping

I just want to check in and see if any other Inspire owners are having this issue:
I have noticed that my phone occasionally drops the network connection and doesn't get it back right away. There are two different flavors of this issue that I have experienced:
1) I was walking my dogs today and the phone suddenly dropped it's connection to AT&T completely. After a few seconds, it reconnected and everything was fine. I was in an area with good coverage and the status bar showed no connection at all.
2) When home, I leave the Wifi on. Earlier today, when I tried to make a call, it simply wouldn't dial out. Then I tried to open a web page and nothing (after turning wifi off). I had to switch airplane mode on and back off to reset the connection. I also received several text messages at once, all of which had been sent hours before (as indicated by the time stamp on the message). It's almost like the phone has an issue swapping back and forth between the carrier connection and the wifi.
Is anyone else experiencing anything like this?
As an update, I noticed that when the wifi is on, there's a check mark under the H+ symbol (rather than the up/down arrows) and when I switch off Wifi, it doesn't go away. During this time, I have no cellular data. Switching airplane mode off and on doesn't seem to work. Sometimes it recovers on its own. Other times, I have to turn the wifi off and on several times.
This is annoying. It seems to be having issues doing the hand-off between Wifi and cellular data. This is really the only issue I have with the phone. Hope they roll out a fix soon.
I had the same problem. I thought it was because I had to add my own APN. (I could not switch my plan around because it was a work SIM). This caused SMS messages to not go out and an overall bad network experience on the phone. I have since returned the phone because I need a reliable network connection and the ability to send/receive SMS messages at all times. Once a fix is found I will be back. I liked the phone alot otherwise.
Are you by any chance using the SIM from another phone? I had the exact same issue yesterday and data did not work for me until I called AT&T and had them update IMEI number from Captivate to Inspire. Hope that helps.
Sent from my Desire HD using XDA App
AnyMal said:
Are you by any chance using the SIM from another phone? I had the exact same issue yesterday and data did not work for me until I called AT&T and had them update IMEI number from Captivate to Inspire. Hope that helps.
Sent from my Desire HD using XDA App
Click to expand...
Click to collapse
Nope. I made it a point to have them activate it in the AT&T store with a new sim because I had read about people having issues when they transfer their SIM. I also had and iPhone 4 previously, so transferring wasn't really an option. I'm definitely on the right data plan, too.
I left the wifi off all night and it did it to me again today. The check mark shows up under the H and it loses all data connectivity. I'm not sure what is causing this, but I'd love to know if there's some kind of workaround. I have messed with a few options (like the data always on option) and haven't had any luck.
AnyMal said:
Are you by any chance using the SIM from another phone? I had the exact same issue yesterday and data did not work for me until I called AT&T and had them update IMEI number from Captivate to Inspire. Hope that helps.
Sent from my Desire HD using XDA App
Click to expand...
Click to collapse
I was using a SIM from another phone. It is the SIM card from my Work phone and I can not change the plan. It does have unlimited text and internet I just cant change it to a 4G plan. I had added the APN that is floating around here and that worked except I was having the same problem as the OP.
greyhulk said:
Nope. I made it a point to have them activate it in the AT&T store with a new sim because I had read about people having issues when they transfer their SIM. I also had and iPhone 4 previously, so transferring wasn't really an option. I'm definitely on the right data plan, too.
I left the wifi off all night and it did it to me again today. The check mark shows up under the H and it loses all data connectivity. I'm not sure what is causing this, but I'd love to know if there's some kind of workaround. I have messed with a few options (like the data always on option) and haven't had any luck.
Click to expand...
Click to collapse
It sounds like a replacement is in order.
stilger said:
I was using a SIM from another phone. It is the SIM card from my Work phone and I can not change the plan. It does have unlimited text and internet I just cant change it to a 4G plan. I had added the APN that is floating around here and that worked except I was having the same problem as the OP.
Click to expand...
Click to collapse
Like I said, my issue was very much like yours and OP's and adding cutom APN made no difference until I called AT&T and had them update IMEI on my account. Presto, all problems went away instantly. I understand that it's not an option for you, sorry
have you tried creating a new apn? try creating one using these settings.
mattbollenbach said:
have you tried creating a new apn? try creating one using these settings.
Click to expand...
Click to collapse
Just did this. Thought it might have resolved it at first, but it didn't. Basically, when I put the phone down for a while, it's like the data connection goes to sleep and doesn't wake up. When I turn the screen on, there's no mobile data. Sometimes, the dual arrows are visible under the "H", but only the up arrow is lit. Other times, the check mark (meaning no data) shows up under th "H" and stays there. Switching Airplane mode off and on will reset the connection.
I hate to say it, but the phone may have to go back. I love everything else about the phone, but this bug is too major to wait for an update or fix. What good is smartphone that doesn't get data reliably?
are you running the stock rom? i haven't been using that rom much so it may behave differently than the custom roms.
i don't think its a common bug. i would see if you can get a replacement phone.
mattbollenbach said:
are you running the stock rom? i haven't been using that rom much so it may behave differently than the custom roms.
i don't think its a common bug. i would see if you can get a replacement phone.
Click to expand...
Click to collapse
Definitely stock rom. No rooting or anything. I didn't notice this on the first day I had the phone because it was on Wifi almost all the time. I turned wifi off to test it and the issue persists. I suppose I should try resetting the phone first, though I'm not looking forward to setting it back up again. After that, I'll take it into AT&T. I'd love to keep the phone. Can't believe no one else is having this issue.
greyhulk said:
Definitely stock rom. No rooting or anything. I didn't notice this on the first day I had the phone because it was on Wifi almost all the time. I turned wifi off to test it and the issue persists. I suppose I should try resetting the phone first, though I'm not looking forward to setting it back up again. After that, I'll take it into AT&T. I'd love to keep the phone. Can't believe no one else is having this issue.
Click to expand...
Click to collapse
yeah, resetting it up is a pain. sorry, and i hope you get it fixed.
Just to say it again. I had the exact same problem as the OP. Maybe we both had a flaky phone?
Okay, turns out there's an issue with the AT&T tower closest to my house. I found out from a rep at AT&T. I haven't left home much at all this weekend, so I had no standard for comparison. I just verified it by turning the wifi off on my iPad and using 3G data. It has the same issue.
Of course, I had already done a factory reset and gone to the AT&T device support center, but at least my phone is fine.
As a side note: I love that Android restores your apps now. I always thought WebOS was awesome for doing that and that was what frustrated me most about Android, with as often as I swap phones.
Wow... Wish this was my problem. I switched back to my Palm Pre+ and my data works fine.

[Q] Any news about ghost calls ?

Hi guys,i,m in Italy,unfortunatly the LG assistant service dosen,t give us any hope for a new fix for this bug,waht is the sitaution in other countries?
i did't noticed this problem.
If you do not use 3g and internet. Try use only 2g signal and edge speed. I heard that's working.
adixtra said:
i did't noticed this problem.
If you do not use 3g and internet. Try use only 2g signal and edge speed. I heard that's working.
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Click to collapse
The "Ghost Calls" also appears with 2G only! I think it's an bug in the Baseband! That's the reason why i flashed back to Froyo... On Froyo i never noticed any Ghost call or another Phone bug!
beatles1312 said:
The "Ghost Calls" also appears with 2G only! I think it's an bug in the Baseband! That's the reason why i flashed back to Froyo... On Froyo i never noticed any Ghost call or another Phone bug!
Click to expand...
Click to collapse
What do you mean with ghost calls? I have experienced that communication freezes completely and only a boot can get it going. With 3G turned off it never happens. After switching off 3G people has stopped complaining about me not answering the phone when they call me.
raskall said:
What do you mean with ghost calls? I have experienced that communication freezes completely and only a boot can get it going. With 3G turned off it never happens. After switching off 3G people has stopped complaining about me not answering the phone when they call me.
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Click to collapse
The O3D is in 2G only mode & everybody that try to call me hears the dial tone but my phone is not ringing.
On 3G/2G auto mode it's the same! The issue is not on every call. Only sometimes.
The next bug with GB is, that the phone don't find the radio signal after a garage etc. without connection. After an reboot everything is fine & the radio signal is ok!
The mobile Internet connection is also not working well! I have full radio signal & HSDPA but the internet is not working! Again reboot & all works well...
With Froyo everything is ok & i have no problems with the Phone function!
21b fixed the data dropping out problem for me and much better battery life. I think when the data drops out the phone eats the battery trying to re-connect.
Sent from my LG-P920 using xda premium
mad_sunday said:
21b fixed the data dropping out problem for me and much better battery life. I think when the data drops out the phone eats the battery trying to re-connect.
Sent from my LG-P920 using xda premium
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Click to collapse
I have also tried V21B but i get the same problems on some calls...
Now i'm trying the new V20B! I really hope that LG have fix it! Battery Monitor is still broken... On all GB ROM's from LG
same problem
I have the same problem, ghost calls, right now my phone is in service, I'm curious if they solve the problem and by what method.
raskall said:
What do you mean with ghost calls?
Click to expand...
Click to collapse
There is an 8 pages long thread about this problem here:
http://forum.xda-developers.com/showthread.php?t=1368386
The issue is happening less often when you use 2G only mode but the problem is still there. Also on my device the loss of connectivity doesn't occur only on 3G & mobile data but also with the WiFi.
When I activate the airplane mode and then I switch back, the WiFi fails to reconnect and only after rebooting the problem is solved.
Does anyone have the same issue?

Randomly disconnects from cellular network

My One S is randomly dropping all reception on cell.network.
If i put it in Flight mode and then turn Flight mode off again and enter my pin, the phone is reconnected again..
Anyone seen this?
That happens to me also. I'll have 3 bars with 4g then all the sudden I have no service for like 2 minutes. I have no idea if its a Rom issue or network issue or radio issue.
Sent from my HTC One S using xda premium
I have also this problem with restart most of the time I have too take out my microchip and put it back in.
Sent from my HTC One S using xda premium
I also experienced network signal getting lost for some time / struck on Airplane mode
my very strange experience is ... my mobile screen is not turning on and keeps on vibrating for half an hour
This used to be a huge problem for me, but the recent OTA has resolved it completely...
I can repeat what I told someone else about text issues. I had the signal issue as well, it would constantly jump up and down and turn into an X so here was my reply...
LibertyMonger said:
I can tell you how i fixed my issue when something similar was happening to me. I had this issue on my previous phone as well so i figured after getting this phone and it continued it had to be something to do with my account setup. Some kind of glitch. So after getting fed up with Tech support I had my network account manager have all my features and account removed, then added back on like it was a new account. Then I did a factory reset and woila! My network signal is stronger than ever. Texts send instantly! Faster than I have ever seen them send! lol.
Click to expand...
Click to collapse
Your issues may not be the same but i can say that my signal is better than i ever had seen it! And absolutely no more loss of signal X's

[Q] Mate7 4g data problem

Hi all,
I've had this great phone MT7-L09 (softare version L09V100R001C00B127) since last December. My problem is that every now and then the 4g cuts off for a period of ten seconds.
It does not matter how strong the signal is nor which or whatever app I'm using. It just loses network. First thing I did was to change the old sim card to a new one. Did not help.
I was in contact with the Huawei support and conclusion was to send phone to service. OK. It came back with the same problem altough they changed the circuit board...so obviously they though that this would solve the problem. I did not. After messing around with it, trying to find if someone else was suffering with the same problem, with no luck, I send it back to service. Now they said that there is nothing wrong with it, but the problem is still there.
I havent noticed anything cut offs using 3g. It's not a major thing but it would be nice to know if its a firmware or any other software related problem.
If I use Netflix or similar where the data keeps coming it works just fine or if I use the phone as Wi-Fi hotspot, no problems.
It just loses network connection using apps like play store, facebook, whatsapp, twitter, every browser ie. firefox, build in browser, chrome, to name a few.
Should I just keep using it as it is or keep sending it back to service until they fix this issue???
Thanks
jopomopo said:
Hi all,
I've had this great phone MT7-L09 (softare version L09V100R001C00B127) since last December. My problem is that every now and then the 4g cuts off for a period of ten seconds.
It does not matter how strong the signal is nor which or whatever app I'm using. It just loses network. First thing I did was to change the old sim card to a new one. Did not help.
I was in contact with the Huawei support and conclusion was to send phone to service. OK. It came back with the same problem altough they changed the circuit board...so obviously they though that this would solve the problem. I did not. After messing around with it, trying to find if someone else was suffering with the same problem, with no luck, I send it back to service. Now they said that there is nothing wrong with it, but the problem is still there.
I havent noticed anything cut offs using 3g. It's not a major thing but it would be nice to know if its a firmware or any other software related problem.
If I use Netflix or similar where the data keeps coming it works just fine or if I use the phone as Wi-Fi hotspot, no problems.
It just loses network connection using apps like play store, facebook, whatsapp, twitter, every browser ie. firefox, build in browser, chrome, to name a few.
Should I just keep using it as it is or keep sending it back to service until they fix this issue???
Thanks
Click to expand...
Click to collapse
Sorry...one stupid question: have you already tried keeping the phone completely stock (without any application and/or software or any kin dof personalisation) for a couple of week and see if the problem still exists?
It really seems to me a software problem. Very strange.
I had the same problem with my MT7-TL10 golden version. For a week or so, the network used to come and go. Then ultimately the sim was not recognized at all. I sent it to Huawei service center and they told me that the sim slot is broken and I had to pay for replacement of the board which I refused. I was sure that I didn't break it. Now I am using my phone with one sim only.
Sent from my HUAWEI MT7-TL10 using Tapatalk
tuddu said:
Sorry...one stupid question: have you already tried keeping the phone completely stock (without any application and/or software or any kin dof personalisation) for a couple of week and see if the problem still exists?
It really seems to me a software problem. Very strange.
Click to expand...
Click to collapse
Thanks for your reply,
I haven't used it only with stock apps for a week maybe a day, but first thing when it came back from service for the first time, I did not install any apps and it still lost the connection anyway...
mirchichamu said:
I had the same problem with my MT7-TL10 golden version. For a week or so, the network used to come and go. Then ultimately the sim was not recognized at all. I sent it to Huawei service center and they told me that the sim slot is broken and I had to pay for replacement of the board which I refused. I was sure that I didn't break it. Now I am using my phone with one sim only.
Sent from my HUAWEI MT7-TL10 using Tapatalk
Click to expand...
Click to collapse
I'm not sure, but isn't the sim card slot located on the circuit board??? If it is, it cannot be the problem, but I must try the second slot anyhow.
jopomopo said:
Hi all,
I've had this great phone MT7-L09 (softare version L09V100R001C00B127) since last December. My problem is that every now and then the 4g cuts off for a period of ten seconds.
It does not matter how strong the signal is nor which or whatever app I'm using. It just loses network. First thing I did was to change the old sim card to a new one. Did not help.
I was in contact with the Huawei support and conclusion was to send phone to service. OK. It came back with the same problem altough they changed the circuit board...so obviously they though that this would solve the problem. I did not. After messing around with it, trying to find if someone else was suffering with the same problem, with no luck, I send it back to service. Now they said that there is nothing wrong with it, but the problem is still there.
I havent noticed anything cut offs using 3g. It's not a major thing but it would be nice to know if its a firmware or any other software related problem.
If I use Netflix or similar where the data keeps coming it works just fine or if I use the phone as Wi-Fi hotspot, no problems.
It just loses network connection using apps like play store, facebook, whatsapp, twitter, every browser ie. firefox, build in browser, chrome, to name a few.
Should I just keep using it as it is or keep sending it back to service until they fix this issue???
Thanks
Click to expand...
Click to collapse
Man why everybody blames PHONE first??? like not trusting !
To fix this problem is to go to networks and u have to restore your apn to default it like refreshes then you can either just turn off data and then on and restart phone
Simona Simmy said:
Man why everybody blames PHONE first??? like not trusting !
To fix this problem is to go to networks and u have to restore your apn to default it like refreshes then you can either just turn off data and then on and restart phone
Click to expand...
Click to collapse
Did not work.
jopomopo said:
Did not work.
Click to expand...
Click to collapse
Reset/Restore phone (backup first)
Simona Simmy said:
Reset/Restore phone (backup first)
Click to expand...
Click to collapse
Does not work, same problem after a numerous resettings. If I may add, I've have couple of other phones of which this problem does not occur.
In same place and conditions these phones work just fine not losing the data connection. Sure, if 4g is not available they use 3g, but never ever will the connection break off.
jopomopo said:
Does not work, same problem after a numerous resettings. If I may add, I've have couple of other phones of which this problem does not occur.
In same place and conditions these phones work just fine not losing the data connection. Sure, if 4g is not available they use 3g, but never ever will the connection break off.
Click to expand...
Click to collapse
faulty 4G module tuner.. phone ... replacement needed...
change preferred network
Go to settings and -->mobile networks-->>preferred network and select "WCDMA only"..
It will fix your problem..
There is no such option in my phone settings, only the option to choose automatic 4g3g2g or automatic 3g2g or 2g, 3g only and 2g only. As previously stated no data loss nor connectivity issues using 3g. It's bit annoying sometimes when phone loses data connection altogether although signal is very strong. Just waiting lollipop upgrade if it'd solve the problem, I doubt it but...
network operator..
I think it's network problem..please contact your network operator..4g network have connection problem from some local area signal towers..so you just put other network company SIM card in your local area..(use 4g supported SIM only)
Thanks for your advice, but I don't think that it's SIM card problem because there is no problem what so ever using my other phone SGS5.
sorry
jopomopo said:
Thanks for your advice, but I don't think that it's SIM card problem because there is no problem what so ever using my other phone SGS5.
Click to expand...
Click to collapse
Hmmm. Sorry friend..I am helpless.. anyway continue your thread here..in Xda have brilliant members..they can help you..best of luck.
Thanks, I totally missed your comment...this is turning out to be quite a puzzle. I've noticed the less battery (<60%) I've have on the phone there seems to be nothing wrong with the 4g connection. ???
To answer to myself, I was too optimistic...nothing to do with battery. It's just so weird that phone works like a charm most of time and then suddenly not. I'm confused...
Now on the newest firmware lollipop 5.1 it fixed my lte problem
same issue
I bought mate 7 a couple of days ago and I keep losing the data connection. the network gets connected and lost again.
i did everything to fix it but no luck. changed sim, restored device, modified APN and no luck.
it keeps disconnecting seems that it is a problem with the phone itself as i have read the same issue on a couple of forums..
hope it is a software issue and get fixed soon as this is annoying.
In service they replaced my phone to a new one mostly because of this problem and I can say it did not help at all. Only upgrading to lollipop will fix the problem ( tested on beta) I'm on b145 now and it does that all the time. I guess it is carrier based problem not SIM nor hardware.

During Call issues

Hi everyone
The HM9 a rock device But
I have an issues during the call!!
The call get disconnected many time during call
I have tried to change the cellular type from 2G to 3G to 4G even to auto type but same results I'm getting
I have tried to restart the phone many times and even i have to pull out the sim card and insert it bu again Same results the phone kept disconnected like crazy ??
Please any help
Mines disconnected a few times during calls too.
Sent from my SM-T800 using Tapatalk
Please guy's anyone can help us
Are you using wifi+? I do and I wonder if its caused by automatic switching between wifi and network?
bonerp said:
Are you using wifi+? I do and I wonder if its caused by automatic switching between wifi and network?
Click to expand...
Click to collapse
I'm wondering that myself. A family member has a P9 Lite and it also occasionally disconnects during calls. It has wifi+ enabled. Maybe it does more harm than good.
I'll turn it off and see if that stops it... I certainly don't have the issue when no wifi is available
Sent from my MHA-L29 using Tapatalk
Maybe try with carrier aggregation off.
bonerp said:
Are you using wifi+? I do and I wonder if its caused by automatic switching between wifi and network?
Click to expand...
Click to collapse
The call gets disconnected either I'm on WiFi or not
Same issue happened to my friend using same phone
The issue still exists please do I need to return back my phone or what should I do
gm007 said:
Maybe try with carrier aggregation off.
Click to expand...
Click to collapse
I have tried both options either its off or on
But same issue exists
You might just need a new sim. I had a dodgy ee sim I transferred from one phone but the new phone didn't like it and caused similar issues. I had to change it twice before it was OK.
Sent from my SM-T800 using Tapatalk

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