Update Xperia Z to Android 4.2.2 via MIUI v5 ROM

The latest version of MIUI (v5) ROM has been launched for Xperia Z, due to the industrious efforts of XDA Developers senior member, Miustone. The ROM is predicated on CyanogenMod 10.2 secure release and gives the perfect customized options over inventory Android 4.2.2 Jelly Bean firmware.

The MIUI v5 ROM is reportedly designed to offer a easy, steady and extremely-customisable Jelly Bean experience to the user. As well as, the ROM is alleged to be optimised for enhanced system performance, improved battery-life and higher processing speeds.

Key Points to Note

The MIUI v5 ROM and instructions provided are limited to Sony Xperia Z model. Verify device model number by navigating to Settings > About Phone

Back up data and settings using recommended custom recovery tool such as ClockworkMod (CWM) or TWRP, as data wiping process is mandatory in this tutorial

Download and installcorrect USB drivers for Xperia Z on computer

Ensure USB debugging mode is enabled on phone by navigating to Settings > Applications > Development or Settings > Developer Options

Double-check the device has at least 80% battery charge to prevent unexpected device shutdown (due to battery drain) while installing ROM

Make sure device is unlocked (not locked to specific carrier) with ClockworkMod Recovery (CWM) pre-installed

If device is stuck at booting or experiences boot loop issues, then remove battery and reinsert, Wipe Cache Partition and Wipe Dalvik Cache a few more times before rebooting

Allow newly installed ROM to stabilise for five minutes before using device

If a Status 7 error message flashes while installing firmware, it could be due to an incompatible device or absence of a necessary kernel (for instance, a Jelly Bean Kernel must be installed before installing any Jelly Bean ROM)

How to Update Sony Xperia Z to Android 4.2.2 Jelly Bean via MIUI v5 ROM

Download Android 4.2.2 MIUI v5 ROM for Sony Xperia Z. Also download Google Apps for your phone on computer

Connect and mount phone's USB mass storage on computer via USB cable

Copy downloaded Android 4.2.2 ROM zipandGoogle Apps zip files to root folder on phone's SD card

Power off phone and disconnect USB cable from computer

Now, boot phone into Recovery mode by pressing and holding Volume Down, Home and Power buttons

Follow onscreen instructions to enter recovery mode

In ClockworkMod recovery, perform a full data wipe task by choosing Wipe Data / Factory Reset. Note: Use volume buttons to navigate and Power to select desired option

Wait until wipe process completes and then perform Wipe Cache Partition. Let process complete and then select Wipe Dalvik Cache from Advance option. This will prevent ROM-related errors or boot loop issues

Once wipe process is done, return to main recovery menu and click Install Zip from SD card

Then select Choose Zip from SD card. Locate the Android 4.3 ROM zip file copied earlier and select by tapping Power. Confirm ROM installation on next screen and let the installation begin

Note:Repeat previous step for installing Google Apps and choose "No" when recovery asks for disable recovery flash

After Google Apps is also installed, choose "+++++Go Back+++++" and tap reboot system now in recovery menu. The phone will now reboot automatically and the first boot might take about five minutes to complete