Google Nexus 4 is powered by a 1.5 GHz quad-core Qualcomm Snapdragon S4 Pro processor, featuring four Krait cores and the class-leading Adreno 320 GPU. In addition to the fast processor, the Nexus 4 also packs 2 GB of RAM and either 8 or 16 GB of internal storage. The device also features a 4.7″ 720p display, delivering 320 ppi.

Nexus 5, Nexus 6, Nexus 7 2012 and Nexus 10 have received the Android 5.1 factory image while the Nexus 4 is yet to receive one. But the Nexus 4 can still be updated to Android 5.1 via the unofficial AOSP ROM. If you want to install Android 5.1 on Nexus 4, follow this guide.

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Disclaimer: Follow the instructions at your own risk. If the device gets damaged, the writer or the owner of the site must not be held responsible.

Pre-requisites and Backing up your Nexus 4:

Requirements:

Steps to install unofficial Android 5.1 on Nexus 4:

  1. Create a Nandroid backup from recovery, in case anything goes wrong.
  2. Download the Android 5.1 zip file and Gapps zip file and transfer it to the phone.
  3. Switch off the phone and boot the phone into Recovery mode.
  4. Next, wipe the cache and the dalvik cache.
  5. Now go to “Install zip” and then “Select zip”. Choose the Android 5.1 zip file.
  6. Now again clear cache and dalvik cache.
  7. Go to ”Install zip”, then “Select zip”. Choose the Gapps zip file.
  8. Then perform full data wipe task. To do so, click “Wipe Data/Factory Reset”, then choose “Yes” on next screen to confirm.
  9. After the process is complete, reboot the phone.

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