re: Giving away an iPhone 6

Like Rob said, you can set up your X from an iCloud or iTunes back up of your 6.

I didn't know if you were going to have to go pick it up from ATT or not. It's faster to just have them do it cause it's a wire transfer and not based on the internet like iCloud.

However, the iCloud backup depends on how much data you have on your phone currently. Apple only gives you 5 GB of storage on iCloud to start. If you have more than that, which most people do, then you'll either have to buy more storage capacity from Apple, it's not expensive at $0.99/month for 50 GB, but it's just an extra hassle and extra money, be it a dollar, that you necessarily don't need. iTunes back up is on your computer and you can back up everything to there regardless of the amount as long as you have the space on your hard drive, but you'll have to have your X plugged into the computer to restore it.