Sony recently rolled out Android 5.1.1 based Lollipop update to the Xperia Z1. The update was released with firmware version 14.6.A.0.368 and like every other OTA, this also breaks root on the device.

Thankfully though, user Hellspawm over at xda has created a pre-rooted recovery flashable custom ROM for the 14.6.A.0.368 firmware which is stock for the most part except for the changes made to root it.

Other than root, the ROM also includes dualrecovery 2.8.21 release so you’ll not lose recovery after flashing the ROM. Also, it is specifically for the Xperia Z1 C6903 model only, so do not install this ROM on other models of the device.

Installation is as simple as it can be, just grab the ROM from the download link below and flash it via a custom recovery of your choice along with a factory reset.

Download pre-rooted Xperia Z1 5.1.1 ROM (14.6.A.0.368)

For help installing the ROM, below is a link to step-by-step installation guide for TWRP recovery.

How to Install a Custom ROM using TWRP Recovery

via xda