2 To 7.0 — Upgrade Android 4.2

Note: Unlocking wipes all user data. Back up now.

Once booted:

Android 4.2.2 has known, unpatched exploits like and Heartbleed (in older OpenSSL). If you connect a Jelly Bean device to public Wi-Fi, you are inviting data theft. Upgrading to Android 7.0 brings security patches from 2016-2017, including full disk encryption and file-based encryption. upgrade android 4.2 2 to 7.0

You might assume newer Android = slower. Surprisingly, Android 7.0 is often faster on old hardware because of: Note: Unlocking wipes all user data