I could imagine that they'll eventually receive a firmware update allowing them to have conduct more modern modes of operation. That said, given that the target

I could imagine that they'll eventually receive a firmware update allowing them to have conduct more modern modes of operation. That said, given that the target network also has 2G besides 3g; it can be configured in a "compatible" mode; one that can and is being exploited in the wild. 3g only networks are not suceptible to that particular type of attack. However, a similair scenario also exists for 3g/4g networks. TL;DR Locking your baseband to the most modern technology decreases the odds for being intercepted/stung but certainly does not guarantee any safety.