Apple devices not connecting after changing contract

[Melodylea]

TT customer since day 1. Updated contract 4 days ago. Expect WiFi to be a little hit and miss for a few days due to optimisation. However, our Apple devices (iPhone & ipad) have disconnected from our wifi and will not allow reconnect. Stating the password is incorrect. It is not. Android phones still OK. Please help. Very frustrating. 

[Michelle-TalkTalk]

Morning,

How are you getting on? Do you still need assistance with this?

Thanks

[TheHornedOne]

Have you checked that the Apple devises are still 'finding' the correct Router [Password] @Melodylea .....................

> Home > Settings > Wi-Fi > MY NETWORKS / OTHER NETWORKS > Router >

.................... because it is not unknown for the connection to 'wander', if disturbed!

~R.

[martswain]

Updating a contract has no effect on the router's WiFi signal.

Which band are your Apple devices trying to connect to, 2.4 or 5 GHz ?

Have you ever changed the WiFi password for either band ?

Suggest splitting the SSIDs and making sure the WiFi passwords are as you expect in the router control panel.