Here's the situation: my friend has some type of VZW LG phone that doesnt have an accessible SIM. He is going on a road trip and wants an iPhone to use the GPS, apps, etc. he is currently eligible for a $150 iPhone4. Could he buy a cheap iPhone4 on Craigslist, add an iPhone data plan to his Verizon account thereby maintaining his eligibility for an upgrade until the new (rumored) iPhone comes out in Sept / Oct, and then transfer his LG phone's number to the newly added iPhone? When that new iPhone comes out he would use his upgrade eligibility towards that and then sell the Craigslist iPhone4 privately. Seems like a waste of an upgrade to get an iPhone4 within months of a rumored new generation iPhone release. Is this, or something like it, doable? Thanks!