I have FP w/ATT. Both phones are v180. I can upgrade and I am choosing 1 of the phones to be a Treo 750(my 1st PDA). During the upgrade it does not allow me to change any of my current plan. I only want to use the Treo primarily for PDA apps I can download and having it also be a phone is a plus.If I upgrade and they send the phone, will moving the sim card to the new device allow me to have a phone and load apps w/o having to purchase a data plan? I use my computer for business usage don't need a data plan. Am interested in rare occ use of the web. Can I just then buy a sd wifi card for this occ use and avoid paying $40/month with a data plan? Thanks.