Boost "Net Registration Failed"

Archived from groups: alt.cellular.nextel (More info?)

The first two months everything worked fine but now can't check messages get
a "network not available" when I try. Get the "Net Registration Failed"
shortly after power on. I've done a Master Clear and Master Reset but that
doesn't work. I'am using a i30sx not supported on Boost and have never been
in my home location Philadelphia. Phone has been in Alabama, Tennessee, and
Georgia with the problem for about 4 weeks. Direct connect and phone calls
work fine. Does anyone have any ideas to try ? What phone should I say I
have that will get me past customer service objections about me using a
i30sx ? If possible similar menus so I can try what they suggest.