system really slow

[Mic66]

It happens that during the day, after having used some apps, the phone becomes really slow. For example when I receive a phonce call, it takes long time for the name and number to appear on the screen. So I hear the phone ringing but I don't see who is calling and, even worst, I can not answer..... Is there anything I can do to solve this issue (apart not using the apps, but than it doesn't have sense to have a smartphone!) Thanks

[Danial-mach1]

try to turn phone off..then remove sim and battery for couple of minutes...then back them in place and start phone

[Alexander1]

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

You can also take a look at the following topic: 

http://talk.sonymobile.com/t5/FAQ/Does-your-phone-feel-slow-and-laggy/m-p/347824#U347824