In reply to paulmck:
> Never had any problem in Nepal. Phone calls were fine and texts were pretty much instant although only a total of about 12 were sent/received. Didn't try the email option as a 10 minute walk out of base camp allowed you to pick up 3G from one of the masts on the Everest trail so used that for any data needs.
So same same network, different country? You can't email via the Hughes 7100 so guessing you had a newer model of phone.