hi, i bought an lg vx8350 online (it was my upgrade time) for 79.99. after a few days of owning that, i decided i wanted an env, so i returned it at a verizon wireless booth, where they made the exchange. however, because of the $50 price difference, i needed to put 50 upfront, and i would get 50 back with a mail in rebate. now im thinking of getting a chocolate. the chocolate is advertised at 79.99, the original price of the vx8350 i paid for. i have heard though, that once you mail the mail in-rebate form, you may not make any exchanges. is this true? because i would be willing to not get the $50 from the mail in rebate back if i could just make the exchange. help please! thankss i am still within the 30 days of owning the env.