Does anyone know if there are two vodafone message centres?? One for VF to VF traffic and one for Vf to telecom tracffic?

My wife receives texts from her colleagues (who are mostly on telecom) and they are all out by 1 hour (i.e. hasn't changed when daylight savings came in). Texts between telecom to telecom are fine, and texts vf to vf are fine.

The received message centre number was a +6421600611 instead of the normal +6421600600.

Any ideas?

EDIT: i seemed to have it wrong, all received text messages on her phone are an hour out - it's a nokia 7370 - to these things have a tIme zone setting?? I can't find one apart from the world time app.