I totally agree with Chris Sells regarding phone support.  I was quite pleased with my Pocket PC phone, which at the time I purchased it, was running the Windows Mobile 2003 OS.  After some time (probably a few months), Microsoft released Windows Mobile 2003 Second Edition.  Naturally, I wanted to upgrade my phone to the new OS release, which had major usability enhancements.  I would have no problem spending more money to purchase the OS upgrade (assuming it was reasonably priced, ie. cheaper than buying a new phone).  I totally ran into a brick wall with all of my attempts to upgrade.  The phone's hardware manufacturer directed me to the cell provider, and the cell provider directed me to the manufacturer.  With phones increasingly becoming more like PCs, a better support model is much needed.