there is a web address on here somewhere that you can order yourself a replacement phone so you wont have to send yours back first. You would recieve one UPS i believe then you would send yours back in the prepaid box. Any of the above methods will void any Service and Repair or Manufacturers warranties(speaking as a service tech) I will try and find the link for you. BTW it would be handled by Sprints Service and Repair Program if applicable
EDIT-i found the thread but the actual link is broken due to the fact Sprint moved some websites behind a firewall maybe there is some other information in it that might help:
http://forum.ppcgeeks.com/showthread...anced+exchange