Hi. I am considering to buy a att palm pre plus in US and then use it in europe. I dont care about the fact that it wont have 3G.

I have 2 questions:
1. is palm pre for att locked or unlocked if i buy it for full price? i saw some shops seling ATT palm pre plus unlocked so i dont know.

2. If the answer to 1 is locked, then how could i unlock it?

Thanks for answers