System update

[Aaron8815]

had system update last night ever since no longer able to connect to my wifi just keeps disconnecting and restarting the phone bt says no issue anyone else have the same issues 

[Robin999]

After any update, it's advisable to wipe the phones cache partition

You will need to plug into a working device or pc/laptop.

https://www.samsung.com/uk/support/mobile-devices/how-do-i-clear-the-cache-on-my-device/

If that doesn't help, then try

Settings >general management >reset >reset all settings

[Aaron8815]

hi i have literally just tried that and still same issue

[Robin999]

Can you boot into Safe Mode. You may have to turn off flight mode but your wifi should still work. Report back with results.

Long press on power icon and tap Safe Mode icon

[Aaron8815]

yes i tried all this earlier on and wasnt any different

[Robin999]

What else have you tried? At this point it would be helpful, instead of us wasting time. If all else fails then consider full factory reset. Presume your device is UK spec, stock firmware and unflashed.

[Aaron8815]

when it restarts it says one ui and optimizing apps 100% and had literally just restarted its self at least 5 times in a row..... absolutely no issues before the stupid update clearly has some form of bug

[Robin999]

Hard reset it by holding power button and volume down for 10 secs.

[Aaron8815]

will this delete all my photos and contacts and apps etc

[Robin999]

No...