No internet on LTE after Wifi drops - AT&T Samsung Galaxy S7 Questions & Answers

I recently wiped my S7 Edge, which fixed a lot of issues I was having. Right after that, I got a small update from AT&T. Since then, I've been having this issue.
After the phone has been sitting all night, connected to Wifi, I take it off the charger and leave for the gym. As soon as it disconnects from my Wifi, I have no connectivity. It shows that it is on LTE, but I can't get data at all. Sometimes, flipping Airplane mode off and then on resolves this, but I actually had to reboot to get connectivity back the other morning.
I don't remember it ever doing this before I wiped and updated. I'm not sure if it's the update or something else. The phone is clean. I manually installed a handful of apps after I wiped.
Anyone else experiencing anything like this at all? It's really annoying.

Try booting into recovery and wiping the cache....it helped a few issues I was having!
Sent from my SAMSUNG-SM-G935A using XDA-Developers mobile app

i am kinda having the same problem i have straight talk once it goes into LTE the upload speed drops download works but data is useless without upload speed my guess was also the update. but my solution to this problem was use a 3rd party app to just let you use 4g, in 4g mode phone works perfectly but it could be a different case for you. in my case I inserted an att sim card which worked perfectly then re inserted my straight talk sim card also work perfectly but after a reboot same problem continued to occured

Related

Leaked 2.2 Data Connectivity Issues

I like many followed the instructions on the Leaked 2.2 to install Froyo.
I performing the rooted instructions requiring me to upgrade to Baseband version and verify that it's 2.05.00.06.11. This went fine and I successfully installed 2.2.
I noticed that I was having real connectivity issues. My bars would drop and connection would seem to cease. I often went from 3g to 1x connectivity and my apps could not connect without a reboot.
I reverted back to 2.1 but it kept the same baseband version 2.05.00.06.11.
I am still having the same connectivity issues.
So far I have seen people suggest dialing *288 to update the towers but that didnt work.
Other say toggling airplane mode fixed it for them. This is not a consistent fix for me.
Please add information here so we can try and find a fix.
I updated mine to the leaked 2.2 yesterday and I did lose my 3G for a few hours. I started to troubleshoot afterwards and toggling airplane mode would restore my 3g connectivity. I haven't noticed anything else that is troublesome so far, however, I am also missing some apps in the market.
TritonB7 said:
I updated mine to the leaked 2.2 yesterday and I did lose my 3G for a few hours. I started to troubleshoot afterwards and toggling airplane mode would restore my 3g connectivity. I haven't noticed anything else that is troublesome so far, however, I am also missing some apps in the market.
Click to expand...
Click to collapse
There is a fix for the market problem -
I am trying to keep this thread about the connectivity issues. I suspect the firmware update did something bad. I am not running any roms or updates.
I'll have to try toggling airplane mode, I haven't tried that.
Yeah, I'm having issues too, also video recording has stopped working.
Sent from my ADR6300 using XDA App
Not real sure if this is the same problem or not, but i'll post it here and we'll see. My phone seemed to have ZERO issues yesterday after the move to 2.2. Everything was working great (related to connections)
This morning, my alarm (on the phone) went off at 6:15am and I swiped it and got up, went and took a shower. While I was coming out I heard "Droid..." and was like, well that sux, a random reboot. A couple minutes later I came over to it and it was on the lock screen and the screen was dim like it was about to turn back off. I touched it to swipe and it was locked up and rebooted a second or so later.
Each time it came up, I had an X next to my signal meter and no WIFI or Data indicators. The process "system" kept dying and eventually causing the phone to reboot. I tried going into airplane mode / coming back out, but nothing.
As a last resort (so I could go to work) was to shut it down gracefully (reboots wouldn't let me get to hboot). And go and do a nandroid of the current setup and restore to yesterday right after I switched to 2.2.
After the nandroid finished I went ahead and rebooted it w/o a restore. This time the phone booted normally, no FC's and it's been running since then w/o any connection/reboot issues.
Obviously I'll be paying attention to this. It is actually nice having the "Droid..." so I know when it reboots
Dmtalon said:
Not real sure if this is the same problem or not, but i'll post it here and we'll see. My phone seemed to have ZERO issues yesterday after the move to 2.2. Everything was working great (related to connections)
This morning, my alarm (on the phone) went off at 6:15am and I swiped it and got up, went and took a shower. While I was coming out I heard "Droid..." and was like, well that sux, a random reboot. A couple minutes later I came over to it and it was on the lock screen and the screen was dim like it was about to turn back off. I touched it to swipe and it was locked up and rebooted a second or so later.
Each time it came up, I had an X next to my signal meter and no WIFI or Data indicators. The process "system" kept dying and eventually causing the phone to reboot. I tried going into airplane mode / coming back out, but nothing.
As a last resort (so I could go to work) was to shut it down gracefully (reboots wouldn't let me get to hboot). And go and do a nandroid of the current setup and restore to yesterday right after I switched to 2.2.
After the nandroid finished I went ahead and rebooted it w/o a restore. This time the phone booted normally, no FC's and it's been running since then w/o any connection/reboot issues.
Obviously I'll be paying attention to this. It is actually nice having the "Droid..." so I know when it reboots
Click to expand...
Click to collapse
I havent had issue with the system process dying and rebooting. Just the incredibly annoying fluctuations in the bars and connectivity.
I would go to use my gTalk or gMail and it would say no internet connection. Or if you open the browser. Same thing.
Warning!
Do not start a new thread with problems/questions in Development sub-forum. If you have to start a new thread, please do so in General. Else, post in the appropriate thread to which your problem/question relates. 2nd offense results in 3 day vacation. Thanks!
No data
I updated the radio as well as the leaked 2.2 ROM. I now can't get any data. It will say there is a 3G connection but the market, Gmail, browser won't work. I was previously able to get data I haven't changed anything since.
I thought my data issue was using the Hybrid Altell/VZW prl, but after a *228 option 2 I am still having an issue. It seems to be when I shutdown the phone, turn it back on, the mobile data connection will not turn on. Toggling airplane mode will fix it, or sometimes a reboot fixes it.
Also having 3g/1x/no data issues post update to 2.2
Upgraded 8PM last night, all good until about 10am this morning, realized none of my apps were sync'd, then tried to use Opera/Market/Etc. all saying connectivity issues. The airplane mode on/off seems to fix it, wondering if its a select few and we should reflash or people are experiencing this across the board...
arlindemini said:
Upgraded 8PM last night, all good until about 10am this morning, realized none of my apps were sync'd, then tried to use Opera/Market/Etc. all saying connectivity issues. The airplane mode on/off seems to fix it, wondering if its a select few and we should reflash or people are experiencing this across the board...
Click to expand...
Click to collapse
I had nearly the exact same thing happen to me. Flashed last night and then noticed the problem early today. A reboot of my phone fixed things; I'll continue to watch things closely.
Just got this for the first time as well.
I was just doing some configuration and needed to reboot - after doing so I did not have 3G and mobile network was ON in the settings.
Toggled to airplane mode and restarded - switched back after startup and 3G is back... but still this is troubling (I don't want there to be ANY problems haha)
All my Issues fixed with link @ bottom, thanks adrynalyne!
I take no credit, this is From: http://forum.xda-developers.com/showthread.php?t=737662
Originally Posted by adrynalyne:
Here is a new version that includes the streaming audio fixes.
http://www.4shared.com/file/RjEL6jSz/market_streaming_fix_froyo.html
I am trying SkyRaiders rom to see if theres any improvements. I am on WiFi and its been working good so far. I will know more tomorrow.
Are you just getting the slow downs/disconnects on cell or also on WiFi? I had some weird WiFi issues last night so I thought it was both. Are you all getting it on all data connections or just the mobile network?
Make sure System Select in Mobile Network settings is on Home Only. I did this and I've had zero data connectivity issues with the leak. Had them when it was on Automatic.
Try it out.
I will join in and say I am also loosing 3G...it would be fine for a little then disappear for a while...toggling wifi and airplane mode helps, but I want it fixed and not have to rely on those.
Seems that Sky Raiders Rom has fixed the issues for me.
brbdc said:
Seems that Sky Raiders Rom has fixed the issues for me.
Click to expand...
Click to collapse
Which version? I am using 2.00 and I am having 3G connectivity issues. When I set my mobile networks from automatic to home, I only connect at 1X instead of 3G.
Is this fixed in Sky Raider 2.01?
UPDATE: I should have stated my original problem which was my 3G data connection was shutting down at random and the only way to get it back was to go in and out of airplane mode. I also JUST NOW updated to Sky Raider 2.01 and see that I don't have and data connection at present. A reboot did not work either. I'll keep trying things...
UPDATE2: Got it working...for some reason it was turned off in settings. Appears to be working fine now. I haven't seen any disconnects yet. Fingers crossed...
UPDATE3: It started doing it again under Sky Raider version 2.01. Don't know whether it's the new v2 radio or something with Froyo...
Alleged v2 Radio Problem
brbdc said:
I reverted back to 2.1 but it kept the same baseband version 2.05.00.06.11.
I am still having the same connectivity issues.
So far I have seen people suggest dialing *288 to update the towers but that didnt work.
Other say toggling airplane mode fixed it for them. This is not a consistent fix for me.
Please add information here so we can try and find a fix.
Click to expand...
Click to collapse
It is beginning to look like maybe this is a radio (2.05.00.06.11) problem an not a OS issue. But what I don't understand is why more people have not complained. I do live in a fringe signal area for 3G, perhaps that has something to do with triggering this problem. But I too have found that toggling airplane mode isn't a consistent fix.
If this is indeed a radio issue, then we may have to just live with it until a new radio version is released. Perhaps it would help if more people came forward and shared their experiences about this alleged problem. If it is only a few of us, then what might we have in common???
Lexus One said:
It is beginning to look like maybe this is a radio (2.05.00.06.11) problem an not a OS issue. But what I don't understand is why more people have not complained. I do live in a fringe signal area for 3G, perhaps that has something to do with triggering this problem. But I too have found that toggling airplane mode isn't a consistent fix.
If this is indeed a radio issue, then we may have to just live with it until a new radio version is released. Perhaps it would help if more people came forward and shared their experiences about this alleged problem. If it is only a few of us, then what might we have in common???
Click to expand...
Click to collapse
See here, 99% sure has to do with WiFi. I've been turning off WiFi before I leave the WiFi area I'm connected to and I've yet to loose data connectivity.
If this is all there is, I have a fully working 2.2 on my DInc now...don't really see a reason to upgrade to the official!
http://forum.xda-developers.com/showthread.php?t=741947

[Q] Data Connection shutting off on Xoom?

I've had my Xoom since the beginning of March and this is the first time I've had this issue.
Earlier today my 3G wasn't working. I go to my settings and try to turn off the mobile network and then turn it back on. That didn't work, so I restarted the tablet. Connects to 3G no problem.
I come back from lunch and the same thing happens. I go to the settings and try to turn off and back on the mobile network. No dice. Reboot, 3G is back.
What gives? Anyone having this problem? Running 3.1 not rooted.
Well, this is an old thread - but I was doing my due diligence by searching before posting a question and this is the closest I could find. In fact, it exactly describes my recent troubles. I had to power cycle my Xoom 4 times yesterday to restore data. Turning data off and back on didn't restore data. Only a power cycle resolves it, for a while...
I live in a 3G only area. I just got my Xoom back from Moto service, after it got stuck in the Honeycomb boot screen animation for the 4th time in 6 months. Since getting it back, I've had these data connection issues. It's strictly stock OS, by the way. Android version 3.2.6 and build HLK75H
If it did it daily, I'd say it's a tablet issue. But yesterday was full of reboots and today it's been fine all day. Sound like a known issue or perhaps just a Verizon data problem?
thanks all!
Well I had something similar but reboots didn't fix it. Sent mine in for the LTE upgrade and returned with signals barely 50% and not staying connected, in either LTE/cdma or cdma modes. I took mine to work and inspected under a scope and saw cold solder joints on all the antenna connectors for the center pin. Reflowed them all and signal strength back up and not dropping data. Not sure if this would apply to you.
Thanks, Tiger. I think my Xoom issue is different since, when I DO have data connection, the signal strength is fine. And reboots restore my connection.
I have discovered that I can force this to happen by leaving an area with wifi coverage. My Xoom now consistently won't transfer from wifi to 3G. As an experiment, I turned off wifi today and it's been fine all day - running only 3G. But, if I have wifi on the transition from wifi to mobile seems to choke it.
data issues too
Mine used to be just fine. After the 4g upgrade I am now having these same disconnect issues as well. Should have never let it out of my hands... I am thinking it is time to root and rom and hope it is a software issue.
rossvtaylor said:
Thanks, Tiger. I think my Xoom issue is different since, when I DO have data connection, the signal strength is fine. And reboots restore my connection.
I have discovered that I can force this to happen by leaving an area with wifi coverage. My Xoom now consistently won't transfer from wifi to 3G. As an experiment, I turned off wifi today and it's been fine all day - running only 3G. But, if I have wifi on the transition from wifi to mobile seems to choke it.
Click to expand...
Click to collapse
Well what your describing sounds more like an app causing the problem. One of ur apps is holding onto the radio (wifi or cell) and is not letting go so the tab can switch properly. Since you sent it in for repair I would assume you made backup before it went in and you just restored it all. Which if the cause is not an app, then one of the system apps restored data conflicts with what's in there now.
If you used titanium backup I would perform a full back up, wipe your tab back to default state. At this point just give your tab a dry run (just skip sign in and adding accounts so google doesnt restore your apps) and use wifi/cell, browse web, for while to see if problem continues. If not then restore "missing apps and data". Not full restore. This way it only restores what's missing (which of course won't be the system apps/data). After this then things I would only restore in system apps would be browser favorites.

[Q] Loosing Data Service

This is my 3rd Sprint S4 over the past few months. All of the devices are loosing the 3g icon but will show bars. Voice and text works fine, data and 4g does not, i have noticed it usually happens when i leave a WiFi area and it has trouble switching back over to cell data. I can reboot the phone and about 80% of the times it will return to normal. I have used odin to reload to factory. I had my phone rooted only and recently install the Triforce rom to see if it was a software or Kernel issue. Same thing is happening on that rom as well. It doesnt matter where i am so i dont beleive its a tower issue. Any idea?
This happens to me as well. Just Sprint being crappy. Try turning airplane mode on and off, same effect as a reboot but faster.
I tried the airplane mode toggle but didnt seem to fix it. If i use even the "Hot reboot" option in triforce rom that doesnt fix it either.
Assuming this this is the same issue I always experience, there is no fix. It's a network thing. Is there 4G in your area?
What happens to me is my phone will be on 3G, then start receiving 4G, but it doesn't recognize that the data service is now different, so nothing works for 15+ minutes or until I toggle airplane mode on/off.
I take it you've tried just turning WiFi off?
Haha, yea, welcome to Sprint. Enjoy losing data when it's least convenient (such as when you need to use navigation or missed your exit and need to be rerouted). Oh well, the price we pay for unlimited data, right?
I have noticed the same thing since I activated my LTE radio. LTE is expanding in my area so I constantly go in and out of 3G and LTE service. Sometimes when this happens data just ****ing stops working until I enter airplane mode and then come back out of it (a reset works as well). For some reason (or it is just a coincidence) The problem has amplified since installing 4.3. Has anyone else noticed an increase in this problem since upgrading? This is absolutely a Sprint problem? Do we know that people have this same issue with other Sprint phones?
I have the same problem. From wifi to f data takes a little bit of time for it to switch over especially since the data toggle is gone with the 4.3 update. Unlimited plan is water downed from my experience compared to tmoblie. But tmoblie service was horrible.
Sent from my SPH-L720 using xda app-developers app
emerald2382 said:
I have the same problem. From wifi to f data takes a little bit of time for it to switch over especially since the data toggle is gone with the 4.3 update. Unlimited plan is water downed from my experience compared to tmoblie. But tmoblie service was horrible.
Sent from my SPH-L720 using xda app-developers app
Click to expand...
Click to collapse
Well Sprint's speed has always been an issue for most of us. That is no surprise. I at least expect to to work AT ALL which apparently it is incapable of doing recently.
JamieP87 said:
This is my 3rd Sprint S4 over the past few months. All of the devices are loosing the 3g icon but will show bars. Voice and text works fine, data and 4g does not, i have noticed it usually happens when i leave a WiFi area and it has trouble switching back over to cell data. I can reboot the phone and about 80% of the times it will return to normal. I have used odin to reload to factory. I had my phone rooted only and recently install the Triforce rom to see if it was a software or Kernel issue. Same thing is happening on that rom as well. It doesnt matter where i am so i dont beleive its a tower issue. Any idea?
Click to expand...
Click to collapse
If wifi is on 3g/4g is not there,, turn off wifi and you should see icon,, if you see bars it's most likely working :sly:
Edit just re read your post, I have the same issues sometimes and as posted above toggling on and off typical works for me,, good luck
Also is your network set to
CDMA/LTE/EVDO? Just throwing out ideas
Sent from my SPH-L720 using Tapatalk
I get this issue all the time & I have to do a battery pull to get my phone working again. Anyone flash a new modem which fixes this? The SGS4 is 10x worse than my HTC EVO 3D was with this issue.
pcfascist said:
I get this issue all the time & I have to do a battery pull to get my phone working again. Anyone flash a new modem which fixes this? The SGS4 is 10x worse than my HTC EVO 3D was with this issue.
Click to expand...
Click to collapse
Seems like a hardware problem based on your description. I am fully convinced that this whole flashing modems things is just a feel-good measure for people who have exhausted all other options. It was big in the Galaxy S2 days, but I have never seen any measurable difference between modems in any meaningful metric on that device. At least not one that could not be attributed to other factors such as signal quality and network load, and nothing consistent. A different modem isn't going to fix a hardware fault or magically improve Sprint's awful service.

Does anyone else's S7 edge do this?

The 4G LTE icon keeps flashing on and off when on wifi. This starts occurring after an indeterminate period of time and will not stop until I restart the phone. Once restarted, it stops for a while and then starts again. Kinda annoying. Video below. I am pressing down on the screen with my finger only to keep the screen from going off and for no other reason.
Mine and my girlfriend's both do this. Annoying and I don't know why.
Sent from my SAMSUNG-SM-G935A using XDA-Developers mobile app
Seems like they have some serious WiFi issues to sort out on this phone. Seems to be affecting people's ability to connect to bluetooth as well. Hope ATT greenlights the patch quickly when it becomes available.
Try taking off the smart switch for wifi/mobile data
Sent from my SAMSUNG-SM-G930A using Tapatalk
Mine does this when it's looking for a GPS signal, it's a part of location tracking, when it looks for a location, it uses GPS, Network info , Wifi info, etc. perhaps thats why, turn off Location services and see if it stops just to test it out.
I chatted with a Samsung rep and he told me to wipe the cache partition in recovery. I did that and the problem has not reappeared in a few days. I also had an update pushed just now, so maybe that will further fix the issue.

Losing mobile network

I have a stock t-mobile s7 edge device. It's losing the mobile network. I've noticed it a couple of months ago - it happened a few times but recently the problem is getting worse. It already happened 3 times this week.
Seems like completely random. Sometimes I notice it after I go somewhere with weak signal or no signal at all. Sometimes when I get back to an area with good signal it reconnects and sometimes it doesn't. Sometimes it shows the bars and says it's connected to t-mobile but 4g doesn't show up at all. So you can call but no internet. Sometimes no signal at all.
When it happens the only way to connect is to reboot the phone. Nothing else helps. If you try to connect to network manually - it can find t-mobile but unable to connect. just spins. Changing from lte to 3g or 2g also doesn't work.
I even tried to create a new APN - same thing.
Please heeeeelp...........
Last time this happened to me on another device, it was the sim card that had a problem. Have you tried with another SIM card?
No, but I don't believe it's a sim card related problem. Wife's phone has the same problem although less frequently. But she also travels less.
It looks like a configuration / firmware or maybe hardware issue to me.
I'm experiencing the same issue. It seems to happen when the phone loses signal completely like when deep inside a building. Then it won't reconnect to data or the network by itself.
From the first moment when I got my edge back in April I noticed that the radio performance was weaker than other phones. Then I got the Note 7 and same issue again. Then back to an s7 edge and the problem seems to be worse on this one specially after the latest software update.
Sent from my SM-G935T using XDA-Developers mobile app
My wife (s7) and me (s7 edge), as well as a co-worker (s7) are having this same issue.
Before it was happening occasionally, but after the last update its happening WAY more often.
Wiping cache seems to help with frequency, but still did not eliminate the problem. Hopefully it gets fixed with an update. I'm not sure how much longer I'll be able to put up with it.
Edit: I forgot to add a "simple" fix I've found that works almost all the time is to turn off mobile data, turn on airplane mode, turn off airplane mode, wait for signal, then turn on mobile data. Those steps in that exact order work for me most of the time.
So I've been having the same issues as everyone stated. The only fix is to reboot the phone, but who wants to that every time. I even changed the sim card!! I wish T-Mobile would get out of their feelings and start selling more flagship phones.
I have made the decision to jump to LG V20. I hope this issue doesn't exist with the LG.
I've just got my s7 edge and I'm sort of having same problem at home got 2 bars and sometimes goes to 4 bars but also wen I called someone the line was crackling but person said could her me fine so done a wiped cache and think it's sorted it now for the time being
(Edit ~ it's done it again could hardly hear person I was talking to)
Sent from my SM-G935F using XDA-Developers mobile app

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