I have been a long time AT&T user and switched early to AT&T's GSM network.  A
few years ago my daughter was on a trip at the fringe of AT&T coverage but
clearly within the bounds on the map.  She nevertheless was charged $75 in
roaming charges for her calls.  When I called customer service I was clearly
told that although she was within the AT&T coverage she locked into another
network, hence she was charged roaming charges.  She was told to ignore the map
and use the indication on the phone display in the future.

Fast forward 3 years.  My son is in the same area.  His phone clearly displays
AT&T so he makes numerous calls.  When the bill arrives there are $103.99 of
roaming charges even though he followed the exact directions from my daughter's
experience.  

I call AT&T customer service.  I am told to determine if roaming ignore the
indication on the phone and use the AT&T coverage maps (which are typically
outdated and have a granularity of about +/- 50 miles).  Thus, to use AT&T you
need to print out the latest coverage map for anywhere you may be going.  If in
question you are supposed to call AT&T customer service to determine if you are
in a coverage area.  RIGHT!!!!!!!  Can you imagine the overload of their
already strained customer service if folks reaslly did this.  By the way this
is suipposedly a printed policy that every user has.  

For the record I was on hold for AT&T customer service for 77 minutes tonight.

This is a very deceptive and ambiguous policy at best, designed to trick users
and increase revenues.  

AT&T sucks!!!!!!!!!!!!!!!!!  Verizon here I come.