i have no problems with the clean rom on my verizon. what you should do is not let the verizon customizations run, then you have to make it so you can send MMS (pix/flix...PM me or look around, instructions are on here) and you are 100% ready to go. and to go back to the verizon stock, you can download it from utstarcom and it does it to how you bought your phone (done this too many a times!) good luck...
here is the UTStarcom link...click model to 6700 and then you want the AKU 2.X fix application if you want to revert back to stock
http://www.utstar.com/pcd/Downloads.aspx
good luck!