I'm upgrading to the Z Force and hoping to keep my Turbo 2 to give to my younger son as a wi-fi media device (pseudo iPod). Is that possible without a sim card? Should I remove the old sim? If I leave the old sim in the phone will that try to activate it on my account (I don't want that)? Should I do a Factory Reset or just remove all of my personal stuff and give it to him without the sim? Help?