Share your experience!
Is LED light suppose to stay active all the time after you receive notification or it should blink every few seconds? I tried few apps which can change flash rate, but it doesn't help. As soon as I get any notification (sms, mail, missed call, facebook, etc.) led light is permanently ON. I think it started after I updated my phone because before that it was fine.
Phone is Xperia E1
Android 4.4.2
20.1.A.2.14
That's probably a third party app
boot on safe mode and report back
http://talk.sonymobile.com/t5/FAQ/How-to-boot-your-phone-into-safe-mode/m-p/348008#U348008
yeah its ok now...call, mail and sms are working fine. Still, messenger, whatsapp and viber led notification is permanently ON, i am new to kitkat and not sure is it supposed to be like that. Thank you 
Then it is a thirdparty app, you will have to uninstall one by one until you find the culprit, or, repair your phone with PCC
Bridge (for Mac)
Alternatives on How to backup Xperias
http://talk.sonymobile.com/thread/36355
just did phone repair via pcc, still the same...i guess its something with software then because i didn't install any other app except viber and messenger
So it works while on safe mode?
I don't have 3rd party apps in safe mode, but things like calls, sms and mail works fine in safe and normal mode now.
That's great