Quality/reliability of a UK service

[andy]

Originally Posted by Przemolog

Sounds interesting. Are 07755's "mobile numbers for dialtrough usage"?
However, I doubt if my brother decides to buy a new SIM - he's pretty busy. Moreover what is the real cost of such a change - I mean cost of a T-Mo SIM minus the initial credit? Of course the reason for which my bother bought O2 (a year ago) was the cheap access to some 0845 numbers (some 5 or even 2p a minute on weekends) but things have changed (up to 15p AFAIR)

Yes - that is probably their only use. They and 07744 are left over from a defunct network, and the int'l part of the call is funded by revenue share on the termination fees.

They are/were included in some network contracts, but this new arrangement has just been made with T-mobile, looking much better for prepaid than contract users.

A T-mobile SIM can be ordered on their website for 50p, occasionally free. I've got some here. A £20 top-up gets 20% bonus, so enough for up to 800 minutes int'l calls