Android provides several features to keep cellular communications secure and
private. These are important because cellular protocols and implementations
present some unique security and privacy risks when compared to other network
types.
- While many internet-based applications implement their own encryption for
communication, voice calls and SMS messages rely on the cellular link layer
encryption for over-the-air privacy.
- Cellular networks implement mobility features like handover and roaming.
While crucial to the smooth operation of cellular networks, these features
expose users to location privacy compromises.
Caution:
Privacy and security in the context of this document reference the connection
between a device and a base station (cell tower). Cellular protocols don't
provide end-to-end encryption. Any traditional voice calls or SMS messages, even
when encrypted over the air, are available to home carriers unencrypted.
Relevant Blogs
For more information, see
Android 14 introduces first-of-its-kind cellular
connectivity security features