I have read your post, and unfortunately I have the exact same issue with my phone THL5000. I connect through wifi, after a while, wifi connection seems to drop although the icon bar is ok, then I have to turn wifi off and on again to be able to connect.I have tried downloading app from google play like wifi fixer and wifi connection fixer but to no avail. It is very frustrating and I have contacted the seller, still no reply from him. Android version of my phone is kitkat 4.4.2. Please can anybody help?