A huge advantage of having a Nexus phone/tablet is that these devices are the first one to get the latest Android OS updates. Jelly Bean 4.2.1 was rolled out a few months ago, and now the Nexus devices have got the OTA (over the air) updates of Android Jelly Bean 4.2.2. It is easy to guess from the version number that it is not a very major update to the Jelly Bean 4.2.1. There are some small changes introduced to this new OS.


Most of the changes are for the user end, but there is some good news for the developers. The new feature introduced in Jelly Bean 4.2.2 is ADB Whitelist. With this feature, connecting your device to a PC with USB debugging enabled will now bring up a prompt which displays your PC’s RSA key and offers the option to add this information to a whitelist. Unless a specific computer is allowed access via this prompt, the device will be inaccessible via ADB. This of course adds an extra level of security to the device thus providing an individual to  use a secure lock screen. Any potential thief with a little ADB knowledge will be unable to access the prompt and add themselves to the whitelist.


However there is a small downside to it. This feature is available for only those devices whose bootloaders are locked. The ADB Whitelist wont work for the users who have unlocked their bootloaders. Other changes that can be found in Jelly Bean 4.2.2 are :

  • The addition of an estimated remaining time and progress percentage to the ongoing download notification
  • New sounds for wireless charging and low battery alerts
  • Long pressing WiFi and Bluetooth on the 4.2.2 quick settings now allows them to be used as conventional toggles, albeit in a rather unconventional way

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