I know this is an old thread and these are old devices, but what Travo79 says above is exactly correct. The FCC says carriers must leave devices unlocked (or unlock them upon request), so they can be used on any network. I am switching my family to T-Mobile from Verizon and I have three devices that appear to be carrier locked. Yes, the phone works for calls when I put in the T-mobile SIM, but soon after boot I get a "SIM card not from Verizon Wireless message and everything else stops working. I called Verizon and they say that the phones are unlocked, but clearly that is BS, since the message says "SIM card not from Verizon Wireless". Why else would that message appear? This is a violation of federal law. If anyone else is having this issue, please let me know. I have three such devices and I'm not going to use crippled devices, or buy new ones just because Verizon wants to be a ****.