We have 2 VM accounts - mine is perfectly OK, but my OH's has an issue, that is happening more & more of late:
When she tries to make a call, everything is silent - the phone displays dialling, but fails soon after. If I try to call her, I receive either a "Network Busy" message or a voice stating there is a problem with this number! A little while later, everything works fine - until it happens again!
I've ruled out her phone - if I swap SIMs her phone works perfectly all day.
Is this a problem with her number or the actual SIM card?