{"id":559,"date":"2012-08-22T12:45:48","date_gmt":"2012-08-22T07:15:48","guid":{"rendered":"http:\/\/www.cvr.cc\/?p=559"},"modified":"2012-08-22T12:45:48","modified_gmt":"2012-08-22T07:15:48","slug":"jelly-bean-on-your-galaxy-nexus-phone","status":"publish","type":"post","link":"https:\/\/cvr.cc\/?p=559","title":{"rendered":"Jelly Bean on your Galaxy Nexus Phone"},"content":{"rendered":"

Galaxy Nexus phone comes with a lot of different firmware variants which are updated by Samsung except three which are maintained by Google. If you are fortunate to get a Nexus phone with Google maintained firmware, you will receive updates over the air (OTA<\/span>) as soon as new releases are made. Samsung releases are usually delayed and will end up in long and frustrated waiting. My phone had a Samsung variant of Icecream Sandwich (4.0.2). However, one need not be frustrated about it, we can unlock the bootloader, update to Google maintained firmware and lock the bootloader when completed.<\/p>\n

<\/p>\n

Different Variants<\/h4>\n

Given below is a list of firmware variants currently in use in different countries, carriers and different models of the phone.<\/p>\n

GSM\/HSPA+ Models<\/h4>\n
    \n
  1. takju<\/code> \u2014 US<\/span> region and carrier-independent firmware released on models sold in the US<\/span> through the Google Play Store<\/li>\n
  2. yakju<\/code> \u2014 International region and carrier-independent firmware released on models sold throughout western Europe.<\/li>\n
  3. yakjudv<\/code> \u2014 Variant for Australia<\/li>\n
  4. yakjujp<\/code> \u2014 Variant for the Middle East<\/li>\n
  5. yakjukr<\/code> \u2014 Variant for South Korea<\/li>\n
  6. yakjusc<\/code> \u2014 Variant for Japan<\/li>\n
  7. yakjuux<\/code> \u2014 Variant for Canada<\/li>\n
  8. yakjuvs<\/code> \u2014 Variant for Brazil<\/li>\n
  9. yakjuxe<\/code> \u2014 Variant for Russia and the former Eastern Bloc<\/li>\n
  10. yakjuxw<\/code> \u2014 Variant for certain carriers in Western Europe<\/li>\n
  11. yakjuzs<\/code> \u2014 Variant for China and Hong Kong<\/li>\n<\/ol>\n

    CDMA\/LTE Models<\/h4>\n
      \n
    1. mysid<\/code> \u2014 Variant for Verizon in the US<\/span><\/li>\n
    2. mysidspr<\/code> \u2014 Variant for Sprint in the US<\/span><\/li>\n<\/ol>\n

      Firmware Updated by Google<\/h4>\n

      Google updates the following firmware variants:<\/p>\n

        \n
      1. takju<\/code><\/li>\n
      2. yakju<\/code><\/li>\n
      3. mysid<\/code><\/li>\n<\/ol>\n

        How I Did<\/h4>\n

        My phone had a firmware variant, yakjuxw<\/code> which was meant for certain carriers in Western Europe and not updated by Google. The simple way to find the phone\u2019s firmware is to install Android System Info<\/a> from Google Play onto the phone, launch the application, go to System\u00a0>\u00a0BuildInfos<\/code> which will provide a screen like the one in the screen shot.<\/p>\n

        \"Galaxy<\/a>
        Info Page as shown by Android System Information<\/figcaption><\/figure>\n

        Look for Product<\/code> (fourth line from bottom of the list) which tells you the firmware installed. In my case, it shows yakju<\/code>, since I took the screen shot after upgrading to Jelly Bean.<\/p>\n

        We need two binaries namely fastboot<\/code> and adb<\/code> which can be downloaded from here<\/a> for Linux and Windows; and from here<\/a> for Mac OS X<\/span>. I compiled the binaries in my Linux box from sources downloaded from here<\/a>. fastboot<\/code> is to communicate with the phone from computer when the phone is in fastboot mode while adb<\/code> is to do the same when the phone is in normal mode.<\/p>\n

        Next step is to download factory images yakju<\/code> of Galaxy Nexus from Google<\/a>.<\/p>\n

          \n
        1. Version 4.0.4 (IMM761): Link<\/a><\/li>\n
        2. Version 4.1.1 (JRO03C): Link<\/a><\/li>\n<\/ol>\n

          Here goes the step by step upgrade process.<\/p>\n

          Unzip the archive for IMM761 which will explode by creating a directory, yakju-imm76i<\/code>. Change working directory to yakju.imm76i<\/code>. Unzip the zip archive, image-yakju-imm76i.zip<\/code> (there will be a zip archive by this name inside the tarball) which will provide, boot.img<\/code>, recovery.img<\/code>, system.img<\/code>, userdata.img<\/code> and android-info.txt<\/code>. Connect the Galaxy Nexus phone to the computer through USB<\/span>. Issue the following commands from the prompt:<\/p>\n

            \n
          1. adb\u00a0devices<\/code> (This will check if the device is connected. You will see complex alpha-numeric product code.)<\/li>\n
          2. adb\u00a0reboot-bootloader<\/code> (reboots your device into fastboot mode.)<\/li>\n
          3. fastboot\u00a0devices<\/code> (same as adb\u00a0devices<\/code>)<\/li>\n
          4. fastboot\u00a0oem\u00a0unlock<\/code><\/li>\n
          5. fastboot\u00a0flash\u00a0bootloader\u00a0bootloader-maguro-primela03.img<\/code> (file name may change depending upon the \"\"ROM.)<\/li>\n
          6. fastboot\u00a0reboot-bootloader<\/code><\/li>\n
          7. fastboot\u00a0flash\u00a0system\u00a0system.img<\/code><\/li>\n
          8. fastboot\u00a0flash\u00a0userdata\u00a0userdata.img<\/code><\/li>\n
          9. fastboot\u00a0flash\u00a0boot\u00a0boot.img<\/code><\/li>\n
          10. fastboot\u00a0flash\u00a0recovery\u00a0recovery.img<\/code><\/li>\n
          11. fastboot\u00a0erase\u00a0cache<\/code><\/li>\n
          12. fastboot\u00a0reboot<\/code><\/li>\n<\/ol>\n

            If you have completed all the above steps, you have upgraded the ROM<\/span> to Google-maintained yakju<\/code> version 4.0.4. Similarly, repeat the same steps for JRO03C. Once done, you will find your phone rebooting to Jelly Bean.<\/p>\n

            \"Galaxy<\/a>
            Home Screen with Android Jelly Bean<\/figcaption><\/figure>\n

            You can lock the bootloader again if you want by issuing the command:<\/p>\n

             fastboot oem lock<\/pre>\n
            before rebooting the device with fastboot\u00a0reboot<\/code>.<\/p>\n","protected":false},"excerpt":{"rendered":"
            Galaxy Nexus phone comes with a lot of different firmware variants which are updated by Samsung except three which are maintained by Google. If you are fortunate to get a Nexus phone with Google maintained firmware, you will receive updates over the air (OTA) as soon as new releases are made. Samsung releases are usually […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3,7,8],"tags":[],"class_list":["post-559","post","type-post","status-publish","format-standard","hentry","category-android","category-galaxy-nexus-phone","category-jelly-bean"],"_links":{"self":[{"href":"https:\/\/cvr.cc\/index.php?rest_route=\/wp\/v2\/posts\/559","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/cvr.cc\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/cvr.cc\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/cvr.cc\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/cvr.cc\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=559"}],"version-history":[{"count":0,"href":"https:\/\/cvr.cc\/index.php?rest_route=\/wp\/v2\/posts\/559\/revisions"}],"wp:attachment":[{"href":"https:\/\/cvr.cc\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=559"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cvr.cc\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=559"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cvr.cc\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=559"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}