So, i'm not exactly new to android but my friend here --> has an issue that thus far I can't figure out. He's got a Huawei M835 (not a great phone, that's not the isue). His ex-gf stole it and is using the heck out of it, messing w/ his contacts, etc. any ideas? i can't log on or get in through metro pcs b/c they need to send tones to the phone, etc, so that's out. thanks!!!