Add Yahoo as a preferred source to see more of our stories on Google. The Vodafone logo can be seen on a sign outside the British telecommunications group's German headquarters. Wolf von Dewitz/dpa To ...

Scam texts and phone calls are something mobile users are resigned to, but telcos are using new technology to block them ...

Add Yahoo as a preferred source to see more of our stories on Google. A company sign with the Vodafone logo is pictured in Duesseldorf. Thomas Banneyer/dpa To prevent mobile phone users in Germany ...