Develop Bugs

[Q] Another weird SIII Wifi problem

Hey All, there are a lot of threads and various internet discussions for various SIII wifi problems, but I have yet to find anything that addresses my current issue:
My phone detects wifi networks that it has not connected to before, but once I have successfully connected to a wifi network and subsequently lost that connection, I can never see that wifi network again. I have tried it with a couple different networks, including a wifi hotspot created by my iphone, and it always happens. My wifi will still show networks that I have not connected to.
Any help would be greatly appreciated.
The phone is not rooted and is using the stock Rogers firmware.
Thanks!

TheAppleChrist said:
Hey All, there are a lot of threads and various internet discussions for various SIII wifi problems, but I have yet to find anything that addresses my current issue:
My phone detects wifi networks that it has not connected to before, but once I have successfully connected to a wifi network and subsequently lost that connection, I can never see that wifi network again. I have tried it with a couple different networks, including a wifi hotspot created by my iphone, and it always happens. My wifi will still show networks that I have not connected to.
Any help would be greatly appreciated.
The phone is not rooted and is using the stock Rogers firmware.
Thanks!
Click to expand...
Click to collapse
has this always been happening or did this come about after your last OTA firmware update?

xBeerdroiDx said:
has this always been happening or did this come about after your last OTA firmware update?
Click to expand...
Click to collapse
This hasn't always been happening... I have had the phone for a few weeks now and it started after I arrived at my company apartment in Spain last week.

TheAppleChrist said:
This hasn't always been happening... I have had the phone for a few weeks now and it started after I arrived at my company apartment in Spain last week.
Click to expand...
Click to collapse
is your phone rooted?
if so try clear data/cache for wifi and see if it works again

pcshano said:
is your phone rooted?
if so try clear data/cache for wifi and see if it works again
Click to expand...
Click to collapse
Not rooted. I would rather not root it.

TheAppleChrist said:
Not rooted. I would rather not root it.
Click to expand...
Click to collapse
your S3 might have wifi power save on
try this
1. Open up the Galaxy*S3*phone dialer
2. Dial *#0011# to enter service mode
3. Press the menu button and select “WiFi”
4. You should see that the “WiFi Power Save Mode” button is “ON”
5. Press it to turn power save “OFF”
Click to expand...
Click to collapse
if it doesn't work, try factory reset (also wipe cache and data)

pcshano said:
your S3 might have wifi power save on
try this
if it doesn't work, try factory reset (also wipe cache and data)
Click to expand...
Click to collapse
I did all that.... Same result.
Got everyone thinking now eh?

TheAppleChrist said:
I did all that.... Same result.
Got everyone thinking now eh?
Click to expand...
Click to collapse
My guess: The router is the problem. Or the router's settings. Not your phone itself.
You can test your Wifi by either connecting to another router or to someone's wifi tethering.

TheAppleChrist said:
I did all that.... Same result.
Got everyone thinking now eh?
Click to expand...
Click to collapse
I get this problem on various devices occasionally. Sometimes it helps when I remove the network from memory and reconnect to it.
Ie. Click "Forget this network" and then rejoin it. Doesn't always help though.

You can unplug the router for few seconds then plug it back in to see if that works.
Sent from my SAMSUNG-SGH-I747 using Tapatalk 2

Mobile Data Gone After Leaving the House

I mostly work from home and use my Wi-Fi there, but, about 50% percent of the time, when I leave the house I’ll have a cell signal, but no LTE or whatnot—mobile data doesn’t work. The only way to fix this is to reboot the phone—enabling/disabling Airplane mode doesn’t resolve the issue.
Anyone else have this problem? I found a similar thread at https://www.reddit.com/r/nexus5x/comments/3qyabc/no_mobile_data_after_leaving_home_and_loosing_wifi/, but I don’t have an account there and was curious to see the response form this forum. For what it’s worth, I use T-Mobile..

Someone mentioned forgetting their WiFi network and adding it again manually fixed the issue for them, did you try that?

bblzd said:
Someone mentioned forgetting their WiFi network and adding it again manually fixed the issue for them, did you try that?
Click to expand...
Click to collapse
No—I didn’t know that was a possible fix. I’ll give it a try and report back. Thanks.

BinkXDA said:
No—I didn’t know that was a possible fix. I’ll give it a try and report back. Thanks.
Click to expand...
Click to collapse
No dice--issue still persists.

Did you try to reset network settings? There is an option to reset it in settings / backup and reset!
Sent from my Nexus 5X using Tapatalk

1902 said:
Did you try to reset network settings? There is an option to reset it in settings / backup and reset!
Click to expand...
Click to collapse
No—I didn’t know this was possible. I’ll give it a try and report back. Thanks!

Having the same problem. I'll show full bars (but no LTE indicator) and every app complains of no connectivity. Enabling/disabling Airplane mode does work for me, but I have to wait about 30 seconds for the phone to re-register with the cell network (T-Mobile) to get my data working again.

TechScribe said:
Having the same problem. I'll show full bars (but no LTE indicator) and every app complains of no connectivity. Enabling/disabling Airplane mode does work for me, but I have to wait about 30 seconds for the phone to re-register with the cell network (T-Mobile) to get my data working again.
Click to expand...
Click to collapse
When there is full signal and there is no LTE/4G indicator, then phone still thinks it is still connected to Wi-Fi. I have not had this issue...

Charkatak said:
When there is full signal and there is no LTE/4G indicator, then phone still thinks it is still connected to Wi-Fi.
Click to expand...
Click to collapse
While this might be true, there is no Wi-Fi icon/the phone does not appear to be connect to Wi-Fi when this issue occurs.

Resetting the network settings did resolve the issue—and I found out this was due to the APN protocol setting. Due to some SIP issues I was having, I changed this from the default IPv6 to IPv4 and, it appears, this caused this issue—though I have no idea why. Resetting causes IPv6 to be the default again and the issue doesn’t happen when this is the case (but I still have some SIP issues). I have since switched this to IPv4/IPv6 and I haven’t had the issue in a week—and this also resolves my SIP issues.
Hope this helps someone. Cheers.

After Disconnect from WiFi no Mobile Data.

Hi everyone,
I have now my OnePlus 3 for 3 weeks and I have noticed that when I'm long in my WiFi network and than I go out of my Wifi (Disconnect). And than it don't Connect to Mobile Network for data. And yes mobile data are aktivatet, the settings shows that the Data Service is off. But this is only so when I'm long in WiFi if I'm only for 20 minutes than it Connect to Mobile Data.
Stats:
Carrier: o2 Germany
Network Typ: 2G and 3G
~Laurinx~

Apn settings correct?
Sent from my ONEPLUS3

HIshan Pavidu said:
Apn settings correct?
Click to expand...
Click to collapse
Yes all right because I get Mobile Data connection but not if I was long in WiFi

Laurinx said:
Yes all right because I get Mobile Data connection but not if I was long in WiFi
Click to expand...
Click to collapse
This is the first time i heard about it try to setting apn manually or try factory reset
Sent from my ONEPLUS3

HIshan Pavidu said:
This is the first time i heard about it try to setting apn manually or try factory reset
Sent from my ONEPLUS3
Click to expand...
Click to collapse
Okay Thats the same answer that i also get in other forums. First i set the APN if this is not working then factory restet.

Laurinx said:
Okay Thats the same answer that i also get in other forums. First i set the APN if this is not working then factory restet.
Click to expand...
Click to collapse
Yeap and before factory reset wait till anybody reply to this im 99% sure its APN problem
Sent from my ONEPLUS3

HIshan Pavidu said:
Yeap and before factory reset wait till anybody reply to this im 99% sure its APN problem
Sent from my ONEPLUS3
Click to expand...
Click to collapse
Okay now i Set the APN maunally now i wait if it is working

Laurinx said:
Okay now i Set the APN maunally now i wait if it is working
Click to expand...
Click to collapse
OK check then
Sent from my ONEPLUS3

No APN reset don't work. Get Disconnect from Mobile Data Service. But I see that the settings says when it is connected Network Type EDGE. But if it gets Disconnected then it says GSM
Edit: Attached ScreenShots

Go to developer options and turn on "cellular data always active". I use that on my phone and it picks up the cell signal almost instantly when out of WiFi range. I am still getting about 5 hrs SOT. ,

Okay i think this is gonna work, instand Switch to Mobile Data. And what to you mean with SOT @calbrs

Today i downloadet the system Update 3.2.2 and I think this bug is patched with this update . Actually no issues with the Mobile Data connection
EDIT: NO DONT work same issue

Laurinx said:
Hi everyone,
I have now my OnePlus 3 for 3 weeks and I have noticed that when I'm long in my WiFi network and than I go out of my Wifi (Disconnect). And than it don't Connect to Mobile Network for data. And yes mobile data are aktivatet, the settings shows that the Data Service is off. But this is only so when I'm long in WiFi if I'm only for 20 minutes than it Connect to Mobile Data.
Stats:
Carrier: o2 Germany
Network Typ: 2G and 3G
~Laurinx~
Click to expand...
Click to collapse
I have exactly the same issue with my OP3 OOS 3.2.2, no root. It is really annoying

Me too, it isn't handling the switch between mobile data and Wi-Fi very well, not sure whether it's just one way, when i get to work and connect to work Wi-Fi I've ended up having to turn off mobile data to get it to use the Wi-Fi connection.

hjf3Gd said:
Me too, it isn't handling the switch between mobile data and Wi-Fi very well, not sure whether it's just one way, when i get to work and connect to work Wi-Fi I've ended up having to turn off mobile data to get it to use the Wi-Fi connection.
Click to expand...
Click to collapse
It is two way. That's my observation. I am very disappointed from the phone which has such problems with basic thing like wi-fi connection. I think this will be my first and last OP phone!

So has anyone found a solution to this issue? What kind of flagship killer has problems with such basic functionality?
I've read on other forums that some devices have a feature called Smart Network Switch, but I can't find that anywhere.
And I really don't think it's the APN...I've modified it in all possible ways and it's still happening...not switching automatically but starts working after switching to airplane mode and back. And the "aggressive" switch option doesn't work either.
If anyone has any idea about how to fix this or how it can be further investigated, please share, it's becoming really annoying. Thanks!

andreiani said:
So has anyone found a solution to this issue? What kind of flagship killer has problems with such basic functionality?
I've read on other forums that some devices have a feature called Smart Network Switch, but I can't find that anywhere.
And I really don't think it's the APN...I've modified it in all possible ways and it's still happening...not switching automatically but starts working after switching to airplane mode and back. And the "aggressive" switch option doesn't work either.
If anyone has any idea about how to fix this or how it can be further investigated, please share, it's becoming really annoying. Thanks!
Click to expand...
Click to collapse
I activated the Mobile Data on in the Developer Options and for me it works pretty well.

The IPv4/IPv6 solution seemed to work. I still have issues when connecting to the wireless network (company wifi, with login credentials and the whole deal) but I used to have the same issue with my Nexus 5, meaning that I have to be disconnected from the mobile data to access the wifi network's login page (forgot to mention this in my previous post). Anyway, I'm happy that I don't have to switch to airplane mode anymore Thanks everyone!

Bad signal and no data connection during calls.

So I've run into an issue that has come about after I've tried to flash custom roms and failed. Basically when I go back to stock roms my signal is very low and while I'm in calls i completely lose data connection or more specifically it switches to 3g. I'm not sure exactly how to fix this. I tried flashing the latest radio image from pie and currently I just took the time of flashing the factory images for pie to both slots but I seem to still have the problem. Any ideas why I'm having this issue? I ran into it before but fixed it somehow but I don't know what I did.

KageBeast said:
So I've run into an issue that has come about after I've tried to flash custom roms and failed. Basically when I go back to stock roms my signal is very low and while I'm in calls i completely lose data connection or more specifically it switches to 3g. I'm not sure exactly how to fix this. I tried flashing the latest radio image from pie and currently I just took the time of flashing the factory images for pie to both slots but I seem to still have the problem. Any ideas why I'm having this issue? I ran into it before but fixed it somehow but I don't know what I did.
Click to expand...
Click to collapse
You have to enable Voice over LTE in settings (network/internet)
Otherwise the phone switches to 3G or even 2G during calls

BabelHuber said:
You have to enable Voice over LTE in settings (network/internet)
Otherwise the phone switches to 3G or even 2G during calls
Click to expand...
Click to collapse
I don't have the option for whatever reason. I did see it before in oreo but not amymore in pie.

KageBeast said:
I don't have the option for whatever reason. I did see it before in oreo but not amymore in pie.
Click to expand...
Click to collapse
It's there ?

BabelHuber said:
It's there
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Click to collapse
I was able to fix the issue. I guess I just needed to switch which network I was on but still all those options aren't there for me. Don't know why.

KageBeast said:
I was able to fix the issue. I guess I just needed to switch which network I was on but still all those options aren't there for me. Don't know why.
Click to expand...
Click to collapse
Mobile network settings can vary depending on the network you're connected to. My Sprint looks different from both of yours.
Sent from my Pixel 2 XL using Tapatalk

Network connectivity stalling

Hello,
Mostly when on WiFi I find that a Web page or app will start to load and then just stop. Only way to get data connectivity back is to toggle airplane mode on and off. Have tried multiple WiFi networks and multiple browsers. Happens probably 80/20 more frequently on WiFi than cellular data.
Any ideas?
Device is essentially factory setup with the latest updates, android 9

Mbedford84 said:
Hello,
Mostly when on WiFi I find that a Web page or app will start to load and then just stop. Only way to get data connectivity back is to toggle airplane mode on and off. Have tried multiple WiFi networks and multiple browsers. Happens probably 80/20 more frequently on WiFi than cellular data.
Any ideas?
Device is essentially factory setup with the latest updates, android 9
Click to expand...
Click to collapse
did you try to reset the network settings?
Settings-About Phone-reset to default-Reset network settings
Reset Mobile Data,Wifi and Bluetooth.

letschky said:
did you try to reset the network settings?
Settings-About Phone-reset to default-Reset network settings
Reset Mobile Data,Wifi and Bluetooth.
Click to expand...
Click to collapse
Hi, yes tried this today after your suggestion, no luck
Any other ideas?

Mbedford84 said:
Hi, yes tried this today after your suggestion, no luck
Any other ideas?
Click to expand...
Click to collapse
Factory Reset?

Update, did a factory reset, no help. So after a few days of testing I have managed to trace the problem down to 5ghz WiFi only. Mobile data and 2.4ghz seem to be working since reset.
Anyone got a similar experience?