Strange high pitched buzz..

[abbieb]

Since I updated the phone on Monday with the latest Sony release 5.0.2 Build Number 23.1.A.1.28 the phone suddenly omits a loud buzzing sound like an out of tune radio station.  It lasts about 2-3 seconds and then goes off by itself.  What is this all about and why are these updates causing SO MUCH damage to the phone?

I am really sick to death of having issues with this phone which I only received in March this year.  I should be able to rely on Sony updates NOT causing damage to the handset but seemingly not.

[Thommo]

Try performing a system repair using PC Companion as this will often fix issues - This will factory reset your phone and erase all data so best to backup before you begin

Switch off your phone and unplug from Pc (Hold volume up and power for around 10 seconds)
Start PC Companion and select Support zone then Update my phone/tablet then in Blue Repair my phone/tablet and follow the on screen instructions - When prompted connect your phone still switched off holding volume down or back button - This should start the repair or reformat process

If you are using Windows 8/8.1 or a 64bit operating system then adjust the settings for PC Companion and run in compatibility mode and chose Windows 7 or XP