Update Xperia Arc/Arc S (LT15i/LT18i) to Android 4.4.2 KitKat with UltraKat Custom ROM
Instructions:
First of all, make sure that you have unlocked bootloader of Xperia Arc and Arc S. If not, then do not proceed!
[For Xperia Arc LT15i users only] You have installed Xperia Arc S LT18i firmware
After unlocking bootloader, follow these steps
Download and put the ROM zip anywhere on your PC
Now copy boot.img to Fastboot folder or Minimal ADB and fastboot Installer folder
Now copy full ROM zip to phone’s SD Card
Also copy Gapps zip to phone’s SD Card
Now turn off your smartphone
Connect USB Cable with your PC only
Now hold menu button on your phone and plug in USB cable in smartphone
It will turn LED blue
[If using ADB & Fastboot Tools] Inside fastboot folder, hold Shift on keyboard and right click mouse
[If using ADB & Fastboot Tools] Click on Open Command Window
[If using ADB & Fastboot Tools] In the command window, type fastboot flash boot boot.img and press Enter
[If using ADB & Fastboot Tools] It will flash the boot.img in few seconds
[If using ADB & Fastboot Tools] Now type fastboot reboot and press Enter
[If using ADB & Fastboot Tools] Now read on after [If using Minimal ADB & Fastboot]
[If using Minimal ADB & Fastboot] Run Minimal ADB and Fastboot installer
[If using Minimal ADB & Fastboot] Type fastboot flash boot boot.img and press Enter
[If using Minimal ADB & Fastboot] It will flash boot.img in few seconds
[If using Minimal ADB & Fastboot] Type fastboot reboot and press Enter
Now when your device is booting up, press volume down button repeatedly to enter recovery mode
Now navigate to Install Zip from SD Card and install ROM zip and then Gapps zip the same way
Use volume keys to navigate while power button to make selections
Go to main menu and wipe cache partition, dalvik cache and factory reset device
It will be done in few minutes
Now just reboot your Xperia Arc or Arc S
First reboot will take a little longer!
ADS HERE !!!