Verizon phone exchanges within 15 day trial period?

ooops. my question is. how many times can you exchange or change rather phones during this period? I had an LG TM510 which has pretty primitive software and the oft-discussed phone book problems/battery life issues. I now am on a cheaper Kyocera 2235 which has a nice menu system but no calendar and the battery cover creaking issue and rubbery buttons driving me nuts. I still have a week + left in my trial period and I am wondering if I can take the Kyocera 2235 back and exchange it for something else? Any recommendations? I hated my AT&T Motorola v60T so the v60i doesn't appeal to me pricewise or as far as performance goes. Any advice regarding Verizon phones would be nice. (Waiting another two weeks for the Samsung a310 unfortunately isn't an option I need a cell phone fast hehehe...I'd prob. like that one too.)

[thisisme]

i guess as long as you keep paying the difference and not lose any of the original parts (manual, box, receipt...) you should be able to get some other phone. you might start pissing of the employees though. i have a vx 1 and its actually pretty cool, much better than the tm 510 but still similar. if flips are your thing then i'd wait for the motorola t720. if not and you reaally need a phone now i suggest and im pretty sure others in here will as well, the samsung t300...hope this helps