I have a 7" Irobot NAVItablet with phone and gps, it looks the same as QG707 BUT CASE IS SLIGHTLY DIFFERENT. I want to be able to disable the Phone on occasions as it uses a lot of battery on standby. Also there is no airplane mode. Can it be done? specification: 2.2 - update 1. kernal 2 6 25 spreadwin ver 126.96.36.1990 (R81p2E_all)(WCDMA) build vo18 ECLAIR eng.hongjie 20110613.144116 I am a newbie so if each step can be can be described in simple terms please.