Unlocking problem

[SS9]

Sometimes when i unlock the phone by pressing the power button the screen doesn't respond when i want to unlock it...it's seems to be frozen and i have to lock the phone again and again and after that i can unlock the phone...this happens once a day sometimes...sometimes twice or more and sometimes don't happen...i have the 4.3 android jelly bean version...who encounter this bug ? what should i do? 

[Sam]

Hi and welcome to the community! Since you're new please be sure that you have checked out our Discussion guidelines.

Do you only have these touch screen issues when unlocking it or do they occur at other times too?

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[SS9]

only when i unlock the phone occured so far...i have the phone from 1 month and after 2 weeks starts to do the freezing

[Sam]

Do you have any taskillers or anti virus software applications installed?

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[SS9]

yeah i have clean master installed.but it's not activated to automatic close the running apps when i lock the phone..that's the problem?

[Sam]

The only way to confirm would to temporarily disable or uninstall the application.

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[SS9]

Ok i am gonna uninstall that app.What anti virus do you recommand to install?.But if happens again what should i do next?

[SS9]

i uninstalled clean master and happened again..what should i do next?

[Sam]

In this case please try running a firmware repair:

1. Download the PC Companion software from http://www.sonymobile.com/gb/tools/pc-companion/
and install it on your PC.
2. Install and open PC Companion then select Support Zone.
3. Phone Software Update.
4. Start.
5. Repair Phone
6. Continue
7. Accept data removal
8. Next
9. Wait for prepare
10. Select Phone
11. Follow the connection steps

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[SS9]

Thank you for the advice...one more question after i do the repair and i saw that it's working, what antivirus do you recommand to install? or should i install again clean master....what do you say?