SMS from Network "@@@@@@@@@@@@" with XDA1

[schwelli59]

everyday I receive about 5-10 SMS from the network on my xda1.
The text in the sms is very simple only @-symbols (about 15-40 in a row)

What does this mean?
How can I avoid these messages?

Thanx

[bob190cm]

Change provider :?: Change number :?:

[Rudegar]

have you asked your provider ?
i mean if they are sendt from the provider
then they would have a better idea as to why and how to stop
them then other owners of the same phone would right ?