My son's bought me a ZTPAD for fathers day this year. I'm having a problem with the wireless (won't turn on). I would like to know how to determine exactly which model I have and what firmware I need to download. The barcode on the unit is as follows M3gps-1n-k1-sa083 I think it's a Z102 but I'm not sure. Can someone confirm the model I have and what exact firmware I would download to re-flash the unit? I went to Custom Android Tablet Firmware, Tablet Roms, herotab, stock, viewsonic firmware but don't know which download to select... Thank you in advance for your help.