Avast! Anti-Theft sends SMS with hight costs for nothing

Hello,
I get a new Sony Z3 and gave my old Samsung S3 (with Avast) to my daughter with a new SIM (all Deutsche Telekom).
Now - when my daughter switched on the device - it sends 4 to 8 SMS to the Mobile from my wife to inform
about the new SIM, telefone-number and location.
I marked the S3 as found in my Account on the Avast Web-Site several times.
But every time my daughter switched on her Smartphone it sends the SMS (and E-mails to my adress) and in my Account
on the Avast-Web-Site the status is reset on “Untrusted SIM”.
This costs about 10 € every month for absolutely nothing (although the contract contains a SMS-Flat in all german networks).
How can I cut out the mistake?

Manfred

Please, read https://blog.avast.com/2014/07/02/how-to-prevent-unnecessary-costs-of-avast-sms-notifications-when-replacing-your-sim-card/ to know more about why Avast needs to communicate via SMS and how to prevent unnecessary costs.