I caved into the Radioshack promotion yesterday and got a "refreshed" iPhone 4 from my 3GS trade-in. For anyone that's curious: iPhone 3GS netted $125 at Radioshack trade-in value. iPhone 4 "refreshed" cost was $124. =I received $1 back in cash. Since it was a trade in, there wasn't any tax charged to me. I signed up one of the eligible lines in my family plan for another two years. They processed it so that my line was actually upgraded iPhone-wise and there were no other charges. I confirmed with At&t that they did everything properly so there wasn't any sim card confusion. AT&T waived the $18 iPhone upgrade fee. Back to the original question, what is the difference between refreshed and refurbished? This refreshed iPhone 4's warranty started in October 2010 and it looks new.