In message , at 20:51:58 on Sun, 11 Mar 2012,
Phil remarked:
I have been experimenting with a 3 SIM in my phone with a view to
switching to their One Plan.

The first dongle I got was from 3, and I used to top it up monthly. But
stopped using it when contention in Central London meant I was unable to
make VoIP calls in the evening. (I wasn't just being cheap, this was for
teleconferencing which combined VoIP and text-chat).

Last year I returned to 3, with an annual top-up (now expired), and was
very happy with the performance. But in the short term I still have some
Vodafone credit to use up.
--
Roland Perry