you can have any calls from people not in your contacts silenced so you don't even know they called and then they are just a missed call and you delete them. works for me, but I don't use my cell phone as an actual phone very much.
My husband and I have cell phones with a "shared data plan" apparently I don't understand what that means as I rarely use any data - most months it is only 1% of the available, and yet they have charged me $15.00 for overage data usage on my husband...
