need to turn on/activate this used i phone 4....what do i need to do
got an i phone 4 from a friend and it has an old sim card in and the last users apple id how or what do i need to do to use the phone
iPhone 4, used phone
You'll need to get your friend to remove the phone from their iCloud account:
What to do before selling or giving away your iPhone, iPad, or iPod touch - Apple Support