Share your experience!
In my phone notification light doesn't glow up whenever there is new text message.. what should i do??
Sounds like it would be wise to try performing a repair of your phone's software.
You can easily perform the interaction with our program Sony PC Companion, availalbe for download from the link below. 
http://www.sonymobile.com/gb/tools/pc-companion/
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Don't use repair because it won't help but will erase all your data, we must wait for the firmware patch to solve this problem but I'm almost sure we'll never see it...