[pcb_revival]

If I hide the SSID on TP Link TD-W8970 router when the ATIV S is powered the wifi connection stays connected until I reboot the phone at which point the phone can no longer find the connection until I broadcast the SSID again.

My connection is known in wifi advanced settings so why do I have to have the SSID publicly broadcast in order to use wifi?

[DBDev]

That sounds strange. Have you tried to delete it and manually adding it when it doesn't broadcast the SSID?

[pcb_revival]

That sounds strange. Have you tried to delete it and manually adding it when it doesn't broadcast the SSID?

Manually adding the SSID solved the problem.

Thanks.

I think the issue was caused by me connecting to the network when the SSID was broadcast then I later hide the SSID.

A further question - Why does connecting to hidden SSID use more battery juice as indicated by the OS when I entered the details.

[marcomura]

A further question - Why does connecting to hidden SSID use more battery juice as indicated by the OS when I entered the details.

Because the phone needs to try connecting to the network periodically instead of waiting for the SSID to be in range.
Since the SSID is not broadcasted, the phone cannot know if it's in range until it tries to connect to it.