March 3rd, 2013, 06:39 AM
Join Date: Sep 2012
Device(s): Samsung Galaxy SII GT-I9100 (XWLSD 4.1.2 Jelly Bean) / (Wishlist) LG Nexus 4
Carrier: SMART Buddy(Philippines)
Thanked 74 Times in 66 Posts
Jelly Bean is a big jump from Ice Cream Sandwich.
I suggest you back up all important files(contacts, messages, app data, etc) and do a full wipe from 3e Recovery( hold VolUp+Home+Power).
By the way, are you rooted? Because if you are, you might want to try Neat Rom XWLSD.
Phone: Samsung GT-I9100
Kernel: Stock non-rooted