True I also think another reason to keep the 1700 HSPA going is for smaller roaming partners from other countries such as Wind Mobile & Mobilicity Canada.
I have family members that travel down from Toronto and they roam on TMO when here. Im sure TMO would rather welcome a full roaming agreement than let ATT have it. Now if we could just implement an agreement with Wind/ Mobilicity for unlimited usage talk/txt/data when TMO hits Canada (major metro areas) instead of TMO having to use Mr. "Rogers" neighborhood, I would be happy.
Also heres a link to what TMO network is supposedly to reflect well into the future, this makes it seems that no matter what HSPA on 1700 mhz will still be around for those who chose to never upgrade.
»farm8.staticflickr.com/7041/7061 ··· b264.jpg