My home wifi network was running really slowly on my phone so I disconnected and now it won't reconnect, says there's an 'authentication problem'. I've tried forgetting and readding the wifi network but to no avail. However, my phone does connect to other wifi networks at school or at other peoples houses.
Also, both my laptop and my iPod connect to the home wifi network fine so I know it isn't a problem with that, it's a problem with the phone.
I've tried a factory reset but it hasn't helped (which is annoying).
Has anyone else had this problem or does anyone have any ideas on what to do next?