ive had no problems.
turns out, in some areas, if they cant get onto a 3 mast, they will hook onto another network at no cost to you.
i asked in the shop about it, and they said that didnt happen anymore, but it certainly happens down the SW.
reception remains fine, intenet speeds drop, and you get a little “roaming” logo pop up.
really happy with my HTC wildfire,
intrnet speed test website reckons i get 2GB DL speed (600mb UL)
which can be reveresed down the wifi as a wireless hotspot for my laptop 😀
cant for the life of me chew through my 1gb limit (tend to use 700mb a month)
and of the 5000 texts and 5000 mins (or somthing like that) i use less than 50 texts, and probably no more than 50 mins in a month.
overkill for me, but im in the contract now, and its not excessive.