Wi-Fi on the Galaxy S22+ drops in two documented ways. After the update to One UI 8.0, owners on Samsung's community report that Wi-Fi turns itself off with the screen on, on every network; the suggested workarounds are to turn off Turn on Wi-Fi automatically and Wi-Fi Power Saving Mode in the Wi-Fi Advanced menu, and, for a router with Fast Roaming enabled, to turn that off.
The checks in more detail
The second is the older pattern of drops on older updates, fixed with the usual steps. Forget the network and rejoin, restart the router, try the other band, and wipe the cache partition after a big update. Samsung's Switch to mobile data feature also leaves Wi-Fi when the signal is weak. Because Wi-Fi and Bluetooth share the 2.4 GHz band, a Bluetooth device can degrade Wi-Fi on that band, so use 5 GHz where possible.
If Wi-Fi still fails, reset network settings. If Wi-Fi turns off only when the phone is idle, check the Battery settings for Put unused apps to sleep and Adaptive battery, since an aggressive setting can power the radio down. Samsung's Members diagnostic also tests Wi-Fi and reports the result, which is useful when you contact the router's maker. Samsung's Wi-Fi diagnostics under Device care test the signal and report a score, and the phone also lists nearby networks with their bands, so a quick scan shows whether your 5 GHz network is visible at the place where you sit. If it is not, the 5 GHz signal does not reach there and the phone is falling back to 2.4 GHz, which explains drops while Bluetooth is in use.
Differential
Likely causes of “Samsung Galaxy S22+ will not connect to Wi-Fi or keeps disconnecting”, and how to tell them apart
- 1
Wi-Fi turning itself off after One UI 8
What separates it Wi-Fi switches off with the screen on
How to confirm Turn off Turn on Wi-Fi automatically and Wi-Fi Power Saving Mode in Advanced
- 2
Fast Roaming on the router
What separates it The phone drops at times
How to confirm Turn off Fast Roaming on the router
- 3
Switch to mobile data
What separates it The phone leaves weak Wi-Fi
How to confirm Turn it off in Wi-Fi Advanced
- 4
2.4 GHz interference with Bluetooth
What separates it Drops while a Bluetooth device is in use
How to confirm Use the 5 GHz band
- 5
A stale profile
What separates it Connected but no internet
How to confirm Forget and rejoin
Before you touch a setting
Record this first — changing settings destroys the evidence
- The One UI version
- The router and band
- Whether Wi-Fi switches off with the screen on
- Whether Bluetooth is in use
Try in this order
0 of 10 completedOpen Wi-Fi Advanced
ReversibleSettings, Connections, Wi-Fi, the three-dot menu, Advanced settings.
Turn off auto Wi-Fi and Power Saving Mode
ReversibleSwitch off Turn on Wi-Fi automatically and Wi-Fi Power Saving Mode.
Turn off Switch to mobile data
ReversibleSo the phone stays on Wi-Fi.
Forget and rejoin the network
ReversibleWith the password ready.
Use 5 GHz
ReversibleJoin the 5 GHz band by name.
Reset network settings
ReversibleSettings, General management, Reset.
Check Adaptive battery and sleeping apps
ReversibleSettings, Battery and device care, Battery, More battery settings, and loosen the limits for a day.
Run the Wi-Fi diagnostic
ReversibleSamsung Members, Phone diagnostics, Wi-Fi, to test the radio.
Scan for the 5 GHz network where you sit
ReversibleOpen Wi-Fi settings and see whether the 5 GHz network name appears with good signal in your usual spot.
Place a mesh node nearer if only 2.4 GHz appears
ReversibleA node closer to the room extends 5 GHz coverage.
Model-specific
What is true of this model and not of its siblings
- One UI 8 reports
- Several owners describe the same Wi-Fi switch-off after the update.
- Shared band
- Wi-Fi and Bluetooth both use 2.4 GHz.
- Idle drops
- Wi-Fi that turns off when idle is often a power setting.
- Diagnostics
- The result tells you whether the radio is fine.
- Band visibility
- If the 5 GHz name does not appear, the phone is on 2.4 GHz and shares the band with Bluetooth.
Stop boundary
When this stops being a self-service repair
- !If Wi-Fi fails on every network after a network reset, contact Samsung
- !If only one router fails, ask its maker
- !If the problem began after an update, report it to Samsung
Evidence ledger
Sources behind this answer
S22 owners whose Wi-Fi turns itself off after One UI 8.0.
Wi-Fi fixes for the S22 and S22 Plus.
Known S22 faults with fixes: camera, speaker, charging, Wi-Fi and more.
Exact questions
Common questions
Why does my S22+ Wi-Fi turn off?+
Owners link it to One UI 8.0 and power saving settings.
Does Fast Roaming matter?+
Turning it off on the router helped some owners.
Does Bluetooth affect Wi-Fi?+
On 2.4 GHz, yes.
Will a reset delete data?+
No.
Why does Wi-Fi turn off when the phone is idle?+
A power saving setting.
Can I test the Wi-Fi radio?+
Yes, with Samsung Members.
How do I know which band my phone uses?+
Tap the connected network and read the band or frequency.