Ok, I am pretty new to this tablet thing.Had my onda vi40 dual core about 3 months its had very little use.At first it worked pretty goodwit throw me out of internet prety often but not always, the main issue is now it wnt connect to wifi, was connecting fine bit first to stop eas my router, error code says Authentication error dont know why, but it still worked fine woth my mobile phone as router but now that has the same problem. Advice I was given, do factory reset, didnt work same problem only know tablet has reset and all is Chinese language. I have contacted onda.com from whom I purched tablet but as yet no reply. Can anyone give some advice on how to resolve these issues??