Apple and Google are trying to stop malicious cell-site simulators to further protect users

Every big carrier in the U.S. except T-Mobile has disabled their 2 G and 3 G networks.

Google released an optional feature for Android devices to turn off the ability to connect to 2G.

Apple introduces Lockdown Mode , which prevents iPhones from connecting to insecure 2 G towers.

Google 's protective measures against CSS attacks go even further by preventing device from using "null ciphers".