If you want to install Stock Android 4.0.3 Ice Cream Sandwich on HTC Sensation you are on a right platform below you can see step-by-step guide for this purpose. Here I’d like to say that This ROM is well-matched only and only with the HTC Sensation/ HTC Desire S/HTC Desire Z/HTC Incredible S so, don’t try this for any other device. Also make sure that you have manage your back-up because the below steps can damage your data.

For this purpose you need a Rooted device also make sure that your device has fully charged.

DISCLAIMER: The below method is bit risky and we will not be held responsible if you lose data or your device gets damaged in the following of this guide so please proceed at your own risk.

Instructions

Step 1

Firstly you need to download the Virtuous Quattro Alpha 3 ROM here and save it to your PC. And then Copy downloaded file directly into the root of the external SD card in your HTC device. After that turn your phone off and Reboot it into ClockworkMod Recovery, as follows:

• Press the Volume Down and Power buttons simultaneously.
• On the screen that appears, highlight “bootloader” (use the Volume keys) and select it using the Power button.
• On the next screen, highlight “recovery” (use the Volume keys) and select it using the Power button.  This will bring your phone into recovery mode.

Step 2

In recovery mode, create a backup of your existing working ROM. To do that, select Backup and Restore > Backup.

Step 3

Now you need to Perform a full wipe of your phone data by doing the following:

• Select “Wipe data/factory reset” then confirm the action on the next screen.
• Select “Wipe Cache Partition” then confirm the action on the next screen.
• Go to “Advanced Settings” from the main menu, then select “Wipe Dalvik cach” and confirm the action on the next screen.

Step 4

After wiping the cache, select “Install zip from sdcard”.

Step 5

Now Select “Choose ZIP from sdcard” and select the downloaded ROM file.  Once you confirm, the ROM will be flashed onto the device.

Step 6

Select “Go back” and choose “Reboot system now” to restart your phone into Ice Cream Sandwich.

Source, Via

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