Of the 1.4 billion Android phones littering our planet, fewer than 10% are encrypted:
When phones aren't encrypted, law enforcement can more easily view their contents. Authorities use specialized software to crack passcodes on locked--but unencrypted--Android devices in about an hour, said an investigator for France's Gendarmerie Nationale.
The Manhattan district attorney said in November that investigators can bypass passcodes on some older Android devices, while Google can remotely reset passcodes on others. His office said encryption "will make it impossible for Google to...assist with device data extraction."
Google said it complied with 63% of 65,500 government requests for user data in the 12 months ending in June 2015.
Google is pushing harder on device makers. Its latest version of Android--dubbed 6.0, or Marshmallow--requires device makers to encrypt phones that contain high-powered processors. As a result, higher-end Android phones released this year and beyond will come encrypted.
Still just 2.3% of Android devices now run Marshmallow, which was released in October. By contrast, 79% of iPhones run Apple's iOS 9, which was released in September, according to company statistics.
For Google — there are "practical constraints" to your digital security.