[Sony Xperia M2] linuxct:
The beta group is closed as the development has stopped. There's no reason to join it anymore. You can grab the latest version available without registering.

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Instructions (LOCKED BOOTLOADER):

- Flash an FTF from the latest Xperia M2 firmware, you can grab the latest as of today (18.6.A.0.182) from here - http://xdaforums.com/xperia-m2/general/ftf-download-centre-xperia-m2-t3157411

- Root your device using EagleRootTool.

- Install latest MultiRecovery version from here.

- Download and copy the latest version of the ROM to your SD-card or Internal Memory. Reboot your device and when you see blue/cyan LED while in the Sony Logo, tap many times the Vol+ button to trigger TWRP.

- Choose Install Zip, Choose from /sdcard if it is in the Internal Memory or /sdcard1 if it's in the SD.

- Choose the EagleXperience-*.*, depending on the version you downloaded, and install it.

- In the Aroma Installer, you must accept the ToS, and once done, you'll be able to choose your preferred app installation method.

- Once it is installed, reboot your device. (If your screen fades to black when the installer finishes, force reboot your device with Vol+ and Power key combination)

- After 7~14 minutes, depending on which apps you chose to install, it should have booted up.

Instructions (OPEN BOOTLOADER):

- Flash an FTF from the latest Xperia M2 firmware, you can grab the latest as of today (18.6.A.0.182) from here - http://xdaforums.com/xperia-m2/general/ftf-download-centre-xperia-m2-t3157411

- Root & install TWRP Recovery following this guide: http://xdaforums.com/xperia-m2/general/unlocked-bl-root-sony-xperia-m2-android-t3214498

- Download and copy the latest version of the ROM to your SD-card or Internal Memory. Reboot your device into TWRP recovery (Pressing the Vol- button while it's off, then power it on and stop pressing Vol- when it boots into TWRP).

- Choose Install Zip, Choose from /sdcard if it is in the Internal Memory or /sdcard1 if it's in the SD.

- Choose the EagleXperience-*.*, depending on the version you downloaded, and install it.

- In the Aroma Installer, you must accept the ToS, and once done, you'll be able to choose your preferred app installation method.

- Once it is installed, reboot your device.

- After 7~14 minutes, depending on which apps you chose to install, it should have booted up.

Upgrade (Via OTA):

- Open the OTA Updater app.

- If there's any new update, it will prompt us. Just hit Download.

- Once it finishes downloading, it'll let us flash it. Just hit the Flash button. Leave unchecked all checkboxes (Backup, Wipe Data and Wipe Cache), unless I explicitely told you to check some in the changelog.

- Once Sony's logo appears, hit the Vol+ button to open TWRP.

- If the installation doesn't start automatically, go to Install, choose your internal memory (sdcard0), go into OTA-Updater folder, Download, ROM, and you'll find there the ZIP.

- OpenRecoveryScript will do the rest for you, so just sit back and relax.

Upgrade (Manually):

- Download and copy the latest version of the ROM to your SD-card or Internal Memory. Reboot your device into TWRP recovery, following the steps from above methods, either Open Bootloader or Locked Bootloader.

- Choose Install Zip, Choose from /sdcard if it is in the Internal Memory or /sdcard1 if it's in the SD.

- Choose the EagleXperience-*.*, depending on the version you downloaded, and install it.

- Optional: If you want to clear your data, go into Wipe, Advanced, and check Data, Cache and dalvik cache.

- Reboot and wait until the system completes the upgrade.