Hi @Eddie12345,
One thing you could try to troubleshoot the issues is to split the SSID's on the router, this will allow you to give the 2.4GHz and 5GHz network bands different names, so your Wi-Fi devices will then see those two networks separately, you can then try connecting to one or the other to see if it will connect to either.
Are you getting a good Wi-Fi signal on the other devices (i.e. are you getting good speeds), as if the connection is poor that may indicate Wi-Fi interference, this could also potentially stop some devices from being able to reliably connect.
If Wi-Fi interference is a possibility you could try changing the channels that your router broadcasts the Wi-Fi signal on, you can use free smartphone Apps like this to see what channels are being used within range of your smartphone, you can then change your router to use channels that are less congested.
The TalkTalk staff on this community may also be able to offer more advice, they will hopefully be able to respond to this post tomorrow.
For one of the TalkTalk staff on this community to be able to look into this you will need to update your community profile to include your name, landline telephone number that your TalkTalk service is provided on & an alternative contact number. This will allow them to identify you, and they will then be able to help.
Don't post any personal details in this thread, just add them to your community profile (only you and the TalkTalk staff on this community can see your profile details).
