I recently read many articles about different kind of attacks made by hackers on smartphone and i was surprised to see how many kinds exist on the network layer (bluetooth, 4G, wi-fi, …)
When we talk about security most of the time we consider the “device part” by instaling apps or protecting OS (antivirus, permissions, “VPN”, tor, etc …) but even with a “secured phone” it seems to be possible to exploit vulnerability coming from operator on network levels such as SS7 and Diameter layers, SIMJacking using old libraries inside SIM card or other approach like bluetooth/wi-fi attacks from a little range.
What do you think about security on these levels ?
Knowing this in the end, is securing a phone a kind of utopia ?
What could we do to improve protections on these layers ?