I have a i730 and i was wondering if it would be possible to trade it in for a i860 at nextel. Anybody know what kinda of trade in policy they have or if they even have a trade in policy? I would imagine with the 730 being about $140 and the 860 being about $300 that i would have to pay the difference but would they accept the 730 back if i have another case on it? Any info would be appreciated...THANX!