Usually you can only replace pay as you go phones with pay as you go phones...BUT I am not 100% sure sooo if you have a retail store near you go and ask them, they can give you more info
This is a list of phones that you can have them programed for prepaid.
6015i -- KIYOCERA --KWC 2325, KX414 -- MOTOROLA -- MotoW755, RazrV3m, V376, W385 -- Verizon -- Blitz, CDM7075, CDM8615, DM7076, PN215
-- Accolade, Chocolate, VX3200, VX3450, VX5200, VX 5400, VX5500, VX6100, VX7000, ENV --SAMSUNG--Alias SCHu740, Gusto, Intensity, Juke, SCHA650, SCHA870, SCHU340, CHU410, SCHU430, SCHU540, Smooth --NOKIA -- 2128i, 2366i, 2650 Mirage, 2705 Shade
You can also chose from the following phones:
1. LG Accolade
2. Samsung Gusto
3. LG Cosmos
4. Samsung Haven
5. Pantech Jest
6. Samsung Intensity
Hope this helps!
Just curious, why doesn't Verizon include some of the phones you mentioned on their web site on the prepaid section? As of now you can only see that the Intensity, Smooth and Accolade can only be used on prepaid. Not sure whom updates the site in such. It'd be nice to see the other phones there on the site directly. I am sure it'd help people out.
Also can the Intensity 2 be used on prepaid?