Sony might be the least to release Android updates to its mobile devices among its tough competitors in the tech industry but a custom ROM shall bring its Xperia Z3 and Xperia Z2 a head start experience to the new world of Android 5.1.1 Lollipop.
Sony Flashtool is now available to install a new stock firmware based on Google's Android 5.1.1 Lollipop. Lucky for those who have rooted Xperia Z3 with model code D6603 and Z2 devices since half of the manual download process will be ditched. Meanwhile, 5.1.1 Lollipop is only available to devices with locked bootloaders.
Before venturing into the installation, developers noted that the custom ROM will be risky since the warranty from the mobile carrier, if under postpaid account, and Sony will be cut off. Also, enable USB debugging on the phone at the Settings menu.
Make sure that battery life is charged up to 80 percent. Do not forget to back up all files and data to external storage memory or PC since the update will wipe out everything including downloaded apps, music, pictures, and messages among others.
To finally install Android 5.1.1 Lollipop update using Sony Flashtool, here's a good way to go.
1. Download the flashtool on PC.
2. Download the Android 5.1.1 firmware on PC.
3. Unzip the flashtool.
4. Turn off the device.
5. Run the flashtool on PC.
6. Connect the device to PC.
7. Before turning on the device, wait for the update to complete.
8. Unplug the USB cable from the phone and PC.
9. Reboot the device.
To check whether or not the update is successfully installed, head over to Settings. The new stock firmware build number should now be 23.4.A.0.546.
Other smartphones and tablets that already have custom ROMs are Sony Xperia Z1, Samsung Galaxy Note 4, Galaxy Note 3, Galaxy S6, Galaxy S5, Galaxy Tab 4 10.1, OnePlus One, and Google 2012 Nexus 7, among others. More custom ROMs are coming up soon.
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