Verizon iPhone 4s to T-Mobile?

Is it possible to unlock the phone to switch to TMo? What about jailbreaking it? Any videos or links?

Verizon is CDMA, Tmobile is GSM. Different cell standards, won't work.

From what I've read, Verizon will not unlock the 4s for use with any domestic carriers and, while it is possible to hack the unlock, it takes hours and you end up with dial-up data speeds and an OS that can never be updated.