only had 1 problem with singlepoint.
called them up to enable international calling - as my folks live abroad. done, made the call to my mother, but then next morining i cant use my phone - line is utterly dead.... got through to them, and yes, they has cut me off, because i had made an international call - and thats outside the profile of calls i normally make, so for security reasons the stopped my service.... i tried to explain that of course it bloody was - id only just asked them to enable it!!! but it was like talking to a brick wall. worst of all it took them almost 3 days !!! to get my phone working again