which method you use to root?

Damm, today my xps automatically on cellular data, checked usage and the culprit is "Android OS+others". Using prepaid hotlink, so buta-buta makan RM3.50 for 1.5mb, lucky can discover in time because suddenly see why got whatsapp update one, else my who prepaid balance gone, hope its not malware. Anyone have this prob?

Offtopic: Also wanna ask if anyone use tunetalk prepaid. I use tunetalk for my iphone and subsribe for 88sen 5mb package, got confirmation that package successful but unable to get data for few hours then gave up and go offline, all this while keeping tab on the data usage (can only get 325kb after few hours), but shocked next day my whole balance gone, tunetalk claim i have already used 128mb for the first 10min and refuse to reimburse me. Anyone have prob with tune talk or any other prepaid?