You’ve seen us showing off Android 4.1 our our phones, but how did we do it? And how can you get Jelly Bean on your phone? Hit play and we’ll show you!

Prerequisites

First off, this tutorial is specific to the GSM version of the Galaxy Nexus, though similar instructions will apply for flashing the Jelly Bean image (but not the radio) onto the Verizon and Sprint versions of the phone.

Also, if you haven’t rooted your phone already you may want to hold off for the official OTA update, which shouldn’t be very long (probably mid-July or early August).

For the rest of you, you’ll want to have OEM unlocked your phone, and flashed the latest version of Clockwork Mod Recovery (CWM).  If you haven’t done that yet, follow the instructions in the CyanogenMod Wiki. Next, download two files to the root of your phone:

  1. XXLF1 Baseband (Radio)
  2. bigxie_maguro_JRN84D_v2-signed

Flashing

Now that you’ve got all your ducks in a row, if you’re willing to undertake the risk (albeit slight) of turning your phone into a brick, go ahead and continue, otherwise, turn back now. We won’t laugh. Promise. Reboot into Recovery Mode by turning off your phone, then pressing and holding the volume button (both up and down), and the power button at the same time. Once you’re at the bootloader screen release the buttons. Use the down-volume button to select Recovery, then press the power button to reboot into recovery mode. From this point on it depends on your recovery image. Basically, you’ll want to backup your current ROM (so you can revert if you need to), then do a full wipe and factory reset. After that, flash the radio, then flash the Jelly Bean image. Reboot. Need more detail? Click play and we’ll walk you through the steps.

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