Question: Is it possible for a "supposedly unlocked" phone to work on T-Mobile & Fido but not work for other carriers such as AT&T?
I bought a Treo 270 off eBay. I said it was unlocked. My AT&T SIM doesn't work in it. I eMailed the guy, he said it had worked on T-Mobile and Fido so he assumed it was unlocked. I tried a friends T-Mobile SIM and it worked.