Nextel IDEN network after 2010 will be bought out by Gov't to use it exclusively for their comm. Sprint is planning (out already) to intigrate their push to talk service with IDEN network so both services are compatibile (not out yet) and than slowly switch customers to their own network so when gov't takes over you will get no service interuption. In theory it sounds ok. I had i355 mentioned in the above post and it is an outstanding phone even if on the bigger side.