I use an old blackberry for work, and recently changed the SIM because VM sent a replacement.
Now I can't send SMS messages.
I've tried to update the Service Centre number but it doesn't look as if they support Blackberry any more. I tried to enter my IMEI number instead but I'm just getting a message that my device isn't supported.
So it looks as if the SIM update has been a bit disastrous for me!