Yes I Can!

How To Install Android 4.0.1 Ice Cream Sandwich With Sense 3.5 For HTC Sensation

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If you like HTC Sense and which you could have it with a dose of Ice Cream Sandwich, your wait is over: XDA Recognized Developer robocik has posted the first ICS ROM with Sense 3.5 for the HTC Sensation. The ROM is still a beta, but most of the core functionality works just fine, and even includes Face Unlock, among other ICS features.

Step 1: Download Ice Cream Sandwich with HTC Sense 3.5 ROM. Transfer it to the root of your device’s /sdcard directory. You can transfer using a file explorer like Astro or ES File Explorer or through your computer by connecting your HTC Sensation with it using USB cable.

Step 2: Tap Reboot to Recovery Mode from ROM Manager on your Sensation. If this fails, you can always turn off your device, hold a specific button combination to boot into ClockworkMod Recovery. Do whatever works for you.

Step 3: Your device will now be booted into ClockworkMod Recovery. From here, you should take a nandroid backup first from backup & restore > backup. This nandroid backup will come handy later on if you wish to revert to your previous state.

Step 4: From ClockworkMod Recovery’s main menu, wipe data/factory reset, wipe cache and wipe dalvik cache.

Step 5: In this step, we will actually flash the ROM to your HTC Sensation. To do this, install zip from sdcard > choose zip from sdcard > [.zip file you transferred in Step 1].

Step 6: Once flashing is complete, select reboot system now from the main menu.