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Question WiFi Problems

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ftrueck

New member
Jun 16, 2021
4
1
Samsung Galaxy S21 Ultra
Hi community,
I'm writing because I have a strange WiFi problem with my S21 Ultra which I had with no other equipment before.

Setup:
- Galaxy S21 Ultra
- FritzBox 7590
- Fritz WLan Repeater 1750E (2x for better range coverage)
- WiFi 5G Auto channel WPA2/3
- WiFi coverage is good (tested with a lot of other devices)

Phone Setup:
- Paired with the WiFi
- Do Not use Mobile Data
- automatically reconnect to wifi

Problem:
The phone does not automatically connect to the WiFi.
The phone also looses the connection to the WiFi several times a day.
When the phone is not connected to the wifi I open wifi settings.

- It happens that the wifi list is completely empty and the circle animation indicates that the phone is searching for nearby connections
- It happens that the wifi list contains a list of wifi networks the phone has seen before when it was connected last to a wifi
- Switching off an on the wifi helps to find the actual networks and the phone then connects back to wifi (most of the time)

I tried already several settings and combinations but so far none of them brought any success. So I would like to know if someone else had a similar issue or has an idea what could go on here.

To me it seems strange that the wifi scan is not working as I would expect it. I would expect the phone to continously refresh the wifi list with networks it sees, but always when the phone lost its wifi connection the list is not working anymore.
 

Kenora_I

Senior Member
Jun 12, 2021
1,157
3
223
Ireland
Redmi 7A
Samsung Galaxy A21s
Try tinkering with the wifi channels and encryption until it shows up.
Or you can try resetting the routers to see if it does anything
This person has a similar issue
 

babyboy3265

Senior Member
Sep 20, 2012
738
222
Jupiter
Hi community,
I'm writing because I have a strange WiFi problem with my S21 Ultra which I had with no other equipment before.

Setup:
- Galaxy S21 Ultra
- FritzBox 7590
- Fritz WLan Repeater 1750E (2x for better range coverage)
- WiFi 5G Auto channel WPA2/3
- WiFi coverage is good (tested with a lot of other devices)

Phone Setup:
- Paired with the WiFi
- Do Not use Mobile Data
- automatically reconnect to wifi

Problem:
The phone does not automatically connect to the WiFi.
The phone also looses the connection to the WiFi several times a day.
When the phone is not connected to the wifi I open wifi settings.

- It happens that the wifi list is completely empty and the circle animation indicates that the phone is searching for nearby connections
- It happens that the wifi list contains a list of wifi networks the phone has seen before when it was connected last to a wifi
- Switching off an on the wifi helps to find the actual networks and the phone then connects back to wifi (most of the time)

I tried already several settings and combinations but so far none of them brought any success. So I would like to know if someone else had a similar issue or has an idea what could go on here.

To me it seems strange that the wifi scan is not working as I would expect it. I would expect the phone to continously refresh the wifi list with networks it sees, but always when the phone lost its wifi connection the list is not working anymore.
You said the phone loses connection and etc. Does that happen only at the location you described, or does it also happen at other locations?

It is possible that your phone also gets confused with the router and the repeater.

1st you need to clearly understand if the issue comes from the phone or possibly from your WIFI devices. Once this is clear, you have something to go on with...
 
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ftrueck

New member
Jun 16, 2021
4
1
Samsung Galaxy S21 Ultra
You said the phone loses connection and etc. Does that happen only at the location you described, or does it also happen at other locations?

It is possible that your phone also gets confused with the router and the repeater.

1st you need to clearly understand if the issue comes from the phone or possibly from your WIFI devices. Once this is clear, you have something to go on with...

- Phone is on standby (placed on a table, etc.)
- I turn it on to check messages,
- No connection to wifi
- Open wifi manager
- No wifi networks listed at all

I do not know why my router/network should be the problem. All other devices in the wifi work flawlessly. It cannot be that I have to restart my wifi router every time the phone finds no wifi at all. That makes no sense to me.
It looks more like the android wifi service is still on sleep and does not report new wifi networks (which would be necessary also to see any wifi at all).
 

lywyn

Senior Member
Jul 19, 2010
335
112
May I suggest....

Settings -> Connections -> Wi-Fi -> (three dots it top right) ->Advanced
Make sure "Turn on Wi-Fi automatically" and "Wi-Fi power saving mode" are both off.

If you use a repeater is it a mesh or AP solution? I find Android will drag its feet letting go of a wifi signal even when walking into range of another known network. Had an extender in garden and even when down to 10% connection on Wi-Fi it would stay connected to extender, I had to turn wifi off and on quickly to get it to pick a better network.
 
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babyboy3265

Senior Member
Sep 20, 2012
738
222
Jupiter
- Phone is on standby (placed on a table, etc.)
- I turn it on to check messages,
- No connection to wifi
- Open wifi manager
- No wifi networks listed at all

I do not know why my router/network should be the problem. All other devices in the wifi work flawlessly. It cannot be that I have to restart my wifi router every time the phone finds no wifi at all. That makes no sense to me.
It looks more like the android wifi service is still on sleep and does not report new wifi networks (which would be necessary also to see any wifi at all).
It seems to be the phone...

Definitely try what lywyn suggested...
 

Post Nine

Member
Sep 1, 2020
49
3
you can also submit an error report on Samsung Members app, it sends reports directly to Samsung and get the feedback.

Download the app from the Galaxy Store if you don't have it on your phone > Memers app > + button > Error report
 

ftrueck

New member
Jun 16, 2021
4
1
Samsung Galaxy S21 Ultra
May I suggest....

Settings -> Connections -> Wi-Fi -> (three dots it top right) ->Advanced
Make sure "Turn on Wi-Fi automatically" and "Wi-Fi power saving mode" are both off.

If you use a repeater is it a mesh or AP solution? I find Android will drag its feet letting go of a wifi signal even when walking into range of another known network. Had an extender in garden and even when down to 10% connection on Wi-Fi it would stay connected to extender, I had to turn wifi off and on quickly to get it to pick a better network.
Unfortunately no success. I configured exactly like suggested. Does the S21 Ultra have problems with handover in meshed WiFi setups?
 
Hi community,
I'm writing because I have a strange WiFi problem with my S21 Ultra which I had with no other equipment before.

Setup:
- Galaxy S21 Ultra
- FritzBox 7590
- Fritz WLan Repeater 1750E (2x for better range coverage)
- WiFi 5G Auto channel WPA2/3
- WiFi coverage is good (tested with a lot of other devices)

Phone Setup:
- Paired with the WiFi
- Do Not use Mobile Data
- automatically reconnect to wifi

Problem:
The phone does not automatically connect to the WiFi.
The phone also looses the connection to the WiFi several times a day.
When the phone is not connected to the wifi I open wifi settings.

- It happens that the wifi list is completely empty and the circle animation indicates that the phone is searching for nearby connections
- It happens that the wifi list contains a list of wifi networks the phone has seen before when it was connected last to a wifi
- Switching off an on the wifi helps to find the actual networks and the phone then connects back to wifi (most of the time)

I tried already several settings and combinations but so far none of them brought any success. So I would like to know if someone else had a similar issue or has an idea what could go on here.

To me it seems strange that the wifi scan is not working as I would expect it. I would expect the phone to continously refresh the wifi list with networks it sees, but always when the phone lost its wifi connection the list is not working anymore.
sometimes it happen when you connect at certain locations.
 

lywyn

Senior Member
Jul 19, 2010
335
112
Unfortunately no success. I configured exactly like suggested. Does the S21 Ultra have problems with handover in meshed WiFi setups?
Mesh is a single network solution so should not be a problem.

The only other thing I can think of is the power-saving mode. My son has his Pixel on power saving all the time and I know sometimes he has to turn off/on wifi to get a connection when waking the phone up
 

ftrueck

New member
Jun 16, 2021
4
1
Samsung Galaxy S21 Ultra
I found the issue! It is WiFi Direct related. The app "nexar" from the dashcam is interfering with normal WiFi on this phone. Nexar conquers the WiFi functionality and is responsible for my wifi disconnecting. The app requires the "Location always" permission. If I remove this permission my WiFi works again normally. So: one has a similar issue: remove "Location always" permission from the nexar app. In my case it helped.
 
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mhammedali21

Member
Jun 20, 2021
9
1
You said the phone loses connection and and many others. Does that show up best on the region you described, or does it also happen at different places?
Kodi nox
It is feasible that your phone additionally receives harassed with the router and the repeater.

1st you need to honestly recognize if the issue comes from the cellphone or likely from your WIFI devices. Once this is clean, you've got something to go on with...
 
Last edited:

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    Hi community,
    I'm writing because I have a strange WiFi problem with my S21 Ultra which I had with no other equipment before.

    Setup:
    - Galaxy S21 Ultra
    - FritzBox 7590
    - Fritz WLan Repeater 1750E (2x for better range coverage)
    - WiFi 5G Auto channel WPA2/3
    - WiFi coverage is good (tested with a lot of other devices)

    Phone Setup:
    - Paired with the WiFi
    - Do Not use Mobile Data
    - automatically reconnect to wifi

    Problem:
    The phone does not automatically connect to the WiFi.
    The phone also looses the connection to the WiFi several times a day.
    When the phone is not connected to the wifi I open wifi settings.

    - It happens that the wifi list is completely empty and the circle animation indicates that the phone is searching for nearby connections
    - It happens that the wifi list contains a list of wifi networks the phone has seen before when it was connected last to a wifi
    - Switching off an on the wifi helps to find the actual networks and the phone then connects back to wifi (most of the time)

    I tried already several settings and combinations but so far none of them brought any success. So I would like to know if someone else had a similar issue or has an idea what could go on here.

    To me it seems strange that the wifi scan is not working as I would expect it. I would expect the phone to continously refresh the wifi list with networks it sees, but always when the phone lost its wifi connection the list is not working anymore.
    You said the phone loses connection and etc. Does that happen only at the location you described, or does it also happen at other locations?

    It is possible that your phone also gets confused with the router and the repeater.

    1st you need to clearly understand if the issue comes from the phone or possibly from your WIFI devices. Once this is clear, you have something to go on with...
    1
    May I suggest....

    Settings -> Connections -> Wi-Fi -> (three dots it top right) ->Advanced
    Make sure "Turn on Wi-Fi automatically" and "Wi-Fi power saving mode" are both off.

    If you use a repeater is it a mesh or AP solution? I find Android will drag its feet letting go of a wifi signal even when walking into range of another known network. Had an extender in garden and even when down to 10% connection on Wi-Fi it would stay connected to extender, I had to turn wifi off and on quickly to get it to pick a better network.
    1
    I found the issue! It is WiFi Direct related. The app "nexar" from the dashcam is interfering with normal WiFi on this phone. Nexar conquers the WiFi functionality and is responsible for my wifi disconnecting. The app requires the "Location always" permission. If I remove this permission my WiFi works again normally. So: one has a similar issue: remove "Location always" permission from the nexar app. In my case it helped.