Last night i was watching a youtube video and my wifi disconnected and i got an error unable to join the network belkin, ever since i have been unable to connect to wifi, i tried forgetting the network, reboot iPhone and it still doesn't work. There is nothing wrong with my router, it is working perfectly, my computers are connected to it and showing good signal, my other phone is connected to it. It is just the iPhone that is the problem. I bought my iPhone 6 months ago and used it from 4.0 and then updated it everytime a new firmware came out, so now its on 4.2.1 and i have been using it on 4.2.1 for 2-3 months with no problems. The other problem is that my signal bars are always low and i have 3g on, so sometimes i use 3g network to acces internet.