Flash Official CyanogenMod 10.1 M1 custom ROM on Samsung Galaxy Nexus I9250

CM10.1 Nightlties Android 4.2.2 available now

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The CyanogenMod team just reached their first M ( monthly / milestone ) release build of the newest CM 10.1 ROM. It is based on the Android 4.2.1 and it packs all the latest features of Jelly Bean along with multiple CM-based functions. It is a great ROM and if you’re a custom ROM fan then you should use this post to update your Galaxy Nexus device with this ROM.

CM10.1 M1 comes with tons of new elements, but the best thing about it is the stability. It is much more stable than the previous Nightlies builds. However, if won’t be as stable as the Final release of CM 10.1 but you should give it a try. For me, it is one the best ROMs that are around now. In order to correctly install it, you will first need to read the guidelines below:

  • use this tutorial only for the Samsung Galaxy Nexus I9250. It doesn’t work with the US versions of this device, so you shouldn’t attempt to install it on any other smartphone.
  • Your phone should be on unlocked bootloader and rooted. Also, a custom Recovery image is required. If yours doesn’t meet these requirements then you should follow the steps in this guide here.
  • Create a full NANDROID backup of your current ROM. This will be the restore point for your device in case something goes wrong and you can’t boot the normal mode of CM10.1. Create such backup via CWM / TWRP Recovery mode.
  • In the ‘how-to’ guide you’ll find a step that asks you to factory reset the device and you should do it. All data from the /system partition will be removed after that and that’s why you might want to backup your SMS, Call Logs and APN Internet Settings. Use these tools to backup: SMS backup & restore | Call Logs backup & restore | APN Settings Backup & Restore | AppBack for Android application. Root access will be asked by some of these tools.
  • Save your Contacts / People data by syncing it with your Gmail account.
  • Enable USB debugging mode from the Developer Options menu.
  • Make sure that the phone’s battery is charged and that it won’t power off during the installation of this new ROM.
  • This is a guide for advanced Android users. Do not blame us in case something goes wrong or you brick your phone in the process. Also, we cannot be held responsible if you lose any data files.
  • Read the entire post and don’t skip any instructions that I’ve listed. Also, use the comments section if you can’t complete any of the listed steps.

You’ve read the guidelines, now yo can get to the tutorial and learn how to flash the latest Milestone release of the CyanogenMod Nightlies.

NOTE: If your phone is already running a CM10.1 ROM then you can skip step 7 and just flash the new M1 build over your current ROM.

How to install CM 10.1 M1 ROM on Samsung Galaxy Nexus I9250:

  1. Download the custom ROM from HERE. Don’t unzip and save the file on your PC.
  2. Download the Google Apps zip from HERE. This is the file you need to flash in order to re-add the Play Store, Gmail and all other Google-based apps. Save the file on PC without extracting the zip contents.
  3. Connect the device to computer and move these files on its Internal SD card. After the files are moved on your phone, unplug it from your PC.
  4. Power off the smartphone.
  5. Boot it into Custom Recovery mode; we’re using CWM recovery in this guide. Enter custom recovery by pressing at the same time Volume Down and Home, which will open Fastboot mode. After that select Recovery option using the volume buttons and wait for the CWM Recovery main menu to appear.
  6. Create a NANDROID backup using the ‘backup and restore’ option. NOTE: if you already have such backup of the current ROM then you can skip this step.
  7. Select ‘wipe data/ factory reset’ option. Confirm this process.
  8. Now you can flash the ROM  by selecting ‘install zip from sdcard’. Select again ‘choose zip from SDcard’ and then find the CM10.1 M1 EXPERIMENTAL zip and confirm that you want to install it.
  9. When the CyanogenMod 10.1 M1 zip has been flashed successfully you need to select again ‘choose zip from sdcard’. Find the ‘Gapps’ zip and confirm its installation.
  10. Get to the main Custom Recovery mode screen when the files are installed with success.
  11. Select ‘reboot system now’.
  12. The first boot process of this new ROM shouldn’t take more than 5 minutes. When the normal boot is complete you will be shown the welcoming screen.
  13. Enter your Google Account details and configure your smartphone. Take control over it and begin testing all the new features.
  14. Tell us in comments which are the best CM 10.1 tools.

These were all the steps that you had to take and now you should test the ROM. If you can’t install the ROM at your first attempt, then you should power off the device and remove its battery. Re-insert it back after 5 seconds and then repeat the entire tutorial starting with step 5. This time the CM10.1 M1 custom ROM will install without problems, but you should make sure that the step 7 is completed with success.

Keep the ROM updated using the CyanogenMod Updater. It can be found by opening Settings, scroll down and tap once the ‘About phone’ field.

For any other questions use the comments section below.

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