My new 4G 'mini' came via the UPS truck Monday evening. I turned it on, signed in to my account and promptly turned it off and packed it back in it's box. The return label is on the way and it's going back to Apple today, postage paid by Apple, mainly because I don't like the tiny keypad and overall size of the mini. Prolly wouldn't do me any good to have an iPhone, either. I'll just stick to my antiquated flip-phone.
After getting spoiled on the iPad 2 (Wi-Fi only) I think I'll just spring for the difference and get the iPad-3 4G. That was such a letdown order.

Sadly, you can't swap an online order at an Apple store, either.