If you have done this ios14 upgrade, please log into your router & go to the WiFi settings and change:-
WiFi Security mode to: WPA2-PSK only
Encryption: AES.
This can be found at the location given below for these routers:-
Huawei HG633/635
Home Network > Wireless Settings > Encryption
Huawei DG8041W (called WPA2 PreSharedKey on this router)
Dashboard > See Internet Settings > Manage advanced settings > Advanced Configuration > WLAN > 2.4G Basic Network Settings
Dashboard > See Internet Settings > Manage advanced settings > Advanced Configuration > WLAN > 5G Basic Network Settings
Sagemcom FAST5364 (Set Security to WPA2 Personal, this must also set the encryption to AES as no separate option for this)
Dashboard > See Wi-Fi Settings > Manage Advanced Settings > Wi-Fi 2.4Ghz gear icon > Basic
Dashboard > See Wi-Fi Settings > Manage Advanced Settings > Wi-Fi 5Ghz gear icon > Basic
DSL-3782
Settings > Wireless (Wi-Fi)
In the Security Settings set:-
Security: WPA2
WPA2 Type: PSK Value
Then go to Advanced settings & under the “Share Security” advanced settings, ensure that the “Cypher Type” is set to “AES”.