I have had my iPhone for 3 months and haven't had problems with the Wi-Fi. My battery was at about 50% before I went to bed, and I woke up with it completely dead. I then realised it wasn't connected to Wi-Fi, I assumed the battery drained because it was trying to connect to the internet. I tried switching Wi-Fi off then back on again, switching the whole phone of then on again, resetting network settings, forgetting the network, all that I could think of. I dont know what else to try, can anyone?