Just a quick question. My wife doesn't want her iphone 6 plus (silver/white). I got it as upgrade $399 (64GB) plus taxes. Selling it for $850 cash. Phone is unopened and still in fedex box. When I do the transaction (don't worry, it's in a super secure place with cameras everywhere inside building). Buyer may or may not want to open up the iphone. But the issue is it's my wife's iphone upgrade. She's currently using the iphone 5S and at home. I am working and doing the sell. So if seller just takes the nano sim card out and puts in his nano sim card, the phone should activate? Right? He has ATT so that won't be an issue? Reason I asked this is when I got my iphone 6 plus (gold) from Apple retail store. I used my nephew's upgrade. When they gave me the phone, it deactivated my nephew's sim card (he's in california) and I am in Georgia. So it killed off his sim card and he had to go get another sim card in California. Obviously my wife will be annoyed if this iphone 6 plus gets activated and kills her sim card while I am at work and she's at home with our 2 young kids. She doesn't want to go to ATT store to get a sim card replacement. So what's the best option? Take the sim card out of new iphone 6 plus I am selling? Have seller activate new iphone 6 plus over wifi at my work place?