The .ftf file (257.95MB) from xda-developers for those want to flash: http://www.multiupload.com/W3B7BOKUXQ
Even though 4.0.2.A.0.42 rolled out since October through SEUS or PC companion. But from my experience, OTA update is the easiest way to remain rooted. It works for the third time now since 2.3.2.
My phone popped up with 4.0.2.A.0.42 OTA update available few hours ago.
Previous Firmware: 2.3.4 (4.0.1.A.0.283) rooted
Update path : OTA through 3G
Duration : Around 15 minutes.
Steps on updating is easy: tap on notification-> download-> install it. It will be done automatically with all contacts, data and preferences remain.
New Firmware Notification & 4.0.1.A.0.283
As compare to 4.0.1.A.0.283, there is not much changed can be notice. Improvements are nothing but it runs just as well as it’s ever done. Two changes as below:
i) Latitude Icon changed
Previous Latitude Icon
New Latitude Icon
ii) New app “Guide”
**For those that doesn’t have Root access, kindly refer to this post: Root with Lock Bootloader: Easy Rooting Toolkit [v3.0]
– 4.0.2.A.0.42 Android 2.3.4 firmware starts to roll out to Xperia arc
– [ROM]Generic LT15i (Arc) 4.0.2.A.0.42 (1247-1041) (Android 2.3.4)