samsung
AT&T/T-Mobile compatible Samsung Galaxy S II available on Newegg
The good news is that for that price, you will be getting the device unlocked and since it is said to be compatible with both AT&T and T-Mobile’s networks, you will have the freedom to choose which carrier you prefer. It’s not a cheap option but then again that’s the price you pay for the freedom of choice. Alternatively you could always wait for the device to pop up on either carrier and get it for a lower price on contract.