Once a GSM (SIM-based) phone is unlocked, then used, does it need to be unlocked again?
joe.attaboy asked:
I own a Palm Treo 650 that I’m about to replace with a Blackberry, and I’d like to sell the Treo on ebay. I bought it new from a dealer (not from my cell provider), and it was unlocked for GSM systems (T-Mobile, Cingular, etc). I’ve used it for over a year now.