[metamatt]

"Locking" doesn't mean the same thing it does for GSM phones; CDMA phones have a builtin ID which is registered with the network, and there's no SIM card or equivalent to swap out to change that ID.

Sprint and Verizon both use the same CDMA frequencies in the US, and Sprint and Verizon phones roam on each other's networks. But there's no button on your Sprint phone to push to make it a Verizon phone, or vice versa. Sometimes you can get the carrier to do it for you -- the new carrier can choose to activate your existing phone on their network. At least I remember stories of people doing that; I never tried it so can't speak from personal experience.

[Yopie]

There is SIM Card equivalent for CDMA technology called R-UIM (Removable User Identity Module). It's commonly used by any CDMA phone outside the US.

I wonder if this CDMA iPhone come with R-UIM card or it have build in ID which register with the network?