Official ICS update for the Xperia Ion (LT28at, LT28i and LT28h) has been officially released by Sony, and you definitely want to update your phone with the latest firmware immediately. But for those who previously had been flashing ICS leaked version, maybe they will not get a notification about the firmware update. In order to update you should flash back to stock firmware (Android 2.3.7 Gingerbread), if you don’t get it done, then you may encounter bootloops after flashing official ICS firmware. Here are short steps to manually flash ICS on Xperia Ion.
How to manually update Xperia Ion to ICS
Has no idea how to use a Flashtool to install a firmware? Please read “How to flash firmwares using Androxyde & Bin4ry’s Flashtool” carefully.