Exclamation [Q] Wifi and Data Network Problem

Hi all,

I've been having inconsistent Wifi and mobile data network connection since the upgrade to Kitkat. I'm on stock Kitkat 4.4.2 (GT-I9505).

For some weird reason, from time to time (say after a week of use), my S4 connection to Wifi AND 3G/LTE just doesn't work. Disabling Wifi to allow it to go onto the network, and vise versa does nothing. Setting the phone to airplane mode and then disabling airplane also did not work.
Data just isn't going through.

The only solution that works is if I restart the phone

Anybody else had this problem? Any solution?

Thanks in advance.