I've had my Samsumg S4 mini for four months now and everything was perfectly fine.
I've been able to connect to the WI-FI at home but now it just keeps saying 'authentication error'. I restarted my phone several times, 'forgotten' the WI-FI and re-entered the password but it still does not connect to the WI-FI.
I have no idea what to do now, can somebody please help!!!