Does iphone 4 verizon work with H2O?

I bought IPhone 4 with Verizon a year ago and now I want to use it with H2O, will it work? Because it doesn't have a sim card like AT&T IPhones, so is there away how I can use it with H2O or Do I have to buy AT&T carrier IPhone.

The iPhone 4 from Verizon is a CDMA only phone
the H2O network is GSM only
these are not compatible

the iPhone 4s and iPhone 5 from Verizon are dual-mode phones, capable of either CDMA or GSM, so either of those will work

also any phone from AT&T would work, if its unlocked 1st

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