Wifi turn off and on without actually connetting to the wlan - Galaxy Note 8.0 (Tablet) Q&A, Help & Troubleshooti

Hello folks,
I have a critical problem with my Galaxy N5100 wifi+3g.
I updated it to the 4.2.2 version of android. after several time I charged it for a long night and when I turned it on it was not possible to connennt to a wlan anymore. the system turn the wifi radio on and off automatically.
Has anybody of you experienced the same problem?

So guys,
bobody else is experiencing this problem? I have also tryied to reset the device to the initial factory settings, but the problem still hold.
It is very annoying.

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[Q] Note 2 not working wi-fi and BT

Hello guys, ill have this problem after night, no changes for phone etc as update or reset havent been done, i don't realy know what happend, just wifi and BT not even turning on, it freez, then turning back to OFF mode and try turn on and so 10 minutes allredy, any body know sollution for that? try make hw reset, nothing changes same problem left.
GT-N7100
android 4.1.1
firmware n7100XXALIH

Galaxy S3 Wifi Issues

Hi
I got a used galaxy S3 for cheap, but wifi was not working on it. Turns out it was the antenna cable inside the phone, so I replaced that part, but it still didnt work. I downgraded the software from 4.1.1 to 4.0.4 (via ODIN), and wifi worked, so I left the phone alone for a few hours. Then I started using the phone and downloaded a few apps then all of a sudden wifi stopped working, and the phone won't connect anymore. Tried rebooting, reflashing, going to *#0011# and turned off wifi power saving mode, but still didnt work. WHen I enable wifi or bluetooth, the I/O switch gets greyed out and it just says "Turning On..." . Anyone know what the issue is? Could it be a hardware problem (wouldnt think so because it worked for a bit).
thanks!
No one has experienced this problem on their phones?
madmajd said:
No one has experienced this problem on their phones?
Click to expand...
Click to collapse
Kernel issue. WiFi drives are built into the kernel. Flash anoher stock kernel if your on stock or flash aosp kernel if not on stock
madmajd said:
Hi
I got a used galaxy S3 for cheap, but wifi was not working on it. Turns out it was the antenna cable inside the phone, so I replaced that part, but it still didnt work. I downgraded the software from 4.1.1 to 4.0.4 (via ODIN), and wifi worked, so I left the phone alone for a few hours. Then I started using the phone and downloaded a few apps then all of a sudden wifi stopped working, and the phone won't connect anymore. Tried rebooting, reflashing, going to *#0011# and turned off wifi power saving mode, but still didnt work. WHen I enable wifi or bluetooth, the I/O switch gets greyed out and it just says "Turning On..." . Anyone know what the issue is? Could it be a hardware problem (wouldnt think so because it worked for a bit).
thanks!
Click to expand...
Click to collapse
I'm experiencing similar trouble with my s3 the wifi never turns on. I've only started having this issue since I got a factory reset done because of some other trouble and now I'm sick with this new issue.
Did you find anyway to fix it yet. 923

Wi-Fi turns on then back off

Hello! So this issue started about 2 weeks ago for me. Whenever I turn my wifi off, the phone will turn the wifi back on for 0.5-1.0 seconds then it will turn it back off. This happens nonstop. The issue persisted even when the phone was in safe mode and still continues even after 3 full factory data resets and wiping the cache partition 3 times as well. I did this through recovery mode. Nothing changed. When this is happening, it seems to drain my battery significantly. The only fix I have found for it has been to leave my wifi on all the time, even when I am not connected to or near a wifi hotspot. The issue also does not happen when the phone is in airplane mode. Also, I did not receive any software updates around the time this issue started happening. I have tried Googling and contacting Samsung and could not come up with a fix.
Is anyone else having or had this issue? If so, did you find any fix? Thanks!
If this thread needs to be moved to the help/troubleshooting section, please tell me how to do that, or do that yourself if you would like mods. This is my first time starting a thread so I am sorry if I put it in the wrong place.
Possible Fix
My Note 7 and S7 Edge were doing the same. I fixed it by disabling "Wifi scanning even while Wifi is turned off" in location settings.

Bluetooth disconnect when screen off

My Bluetooth disconnects whenever the screen turns off. This has been happening since the Oreo update. I have used Xperia Companion Software Repair, but it doesn't help. Network reset does help for a few hours but the issue always comes back. Anyone else have this problem, and did you find a solution?
benjaminclaw said:
My Bluetooth disconnects whenever the screen turns off. This has been happening since the Oreo update. I have used Xperia Companion Software Repair, but it doesn't help. Network reset does help for a few hours but the issue always comes back. Anyone else have this problem, and did you find a solution?
Click to expand...
Click to collapse
Edit: I found that turning off wifi and wifi scanning fixes the issue.
I know this is an old post but dude you're a lifesaver. This was driving me nuts until I found your post!

Samsung Galaxy A3 2017 (320F) (WiFi, Bluetooth, battery life, restarting)

Hello. I have Samsung Galaxy A3 2017 and have a few issues with it. First thing is battery life. After upgrading from Android 7 to Android 8, battery life significantly decreased! I even know the reason why it is happening (it decreases on standby mode. If you will remove SIM card or go to the Airplane mode, battery life is great) Probably many of you know about this issue? - Do you know how to fix this?
Another problems started about an year ago. Firstly, we were not able to turn on WiFi. This is also known issue on Lineage OS as I know, but this phone is still running its original Android 8. After few months, we could not turn on Bluetooth as well. After that, I tried a factory reset and that is when things got worse! After factory reset, phone was still not able to turn on WiFi and Bluetooth and plus it was restarting over and over again. During these restarts, you can not turn off your phone. If you will push the Power off button, it will simply restart the device. After a long time it stops restarting and you are able to turn it off, but Wif and Bluetooth are still not working. If you will turn off phone then it still starts restarting again and again. Now I have noticed that it shows antenna when there is no SIM card in it. Even signal strength is changing. Of course if I am trying to call or go to the settings, it says that there is no SIM card inside.
Please, could you help me to solve any of these problems? I have cleared partitions, made factory reset few times, wrote latest firmware for this model using Odin but none of them fixed anything.
Can I downgrade to Nougat? or should I try some custom ROM? If yes, which one?

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