I'm the owner of a Motorola MPx220 and I use it on Cingular in the states. A few weeks ago I did an exchange program and stayed in Germany for a few weeks. I didn't want to use cingular in germany, and I was lured in by Vodafone's marketing, so I went to Vodafone and bought a "Callya" card, kinda of a pay as you go. For €20 you get an SIM card, and €10 credit. It was great and worked nicely, and the prices were fine, but I had one problem:
every 2 or 3 minutes I literally recieved a batch of 10 to 15 text messages (SMS). They didn't have a sender and they all said "the contents of this message cannot be displayed". I tried to ignore it at first, however after half an hour I already had my inbox full of over 100 text messages. I turned the notification sound off, but it still drained my battery very quickly, so I everntually kept my phone on flight mode.
Normally I wouldn't really care for this, but I'm going to live in germany for 6 months so it is an issue for me.
Is this an MPx220 hardware problem, or is it a Vodafone problem? I went to a Vodafone store and asked for help, but they said that they weren't responsible for the messages. What can I do?
EDIT: If it matters, I was on the Vodafone D2 network and I was staying in Northwestern Germany (the state of Niedersachsen)