Share your experience!
From what you're describing it sounds like a hardware problem in your phone. I suggest you contact your local Sony Xperia support (http://www.sonymobile.com/global-en/support/contact-us/) if the service location can't fix it for you.
i am also having the same problem. The service center staff are not able to solve it and SONY does not care about their coustmer once the phone is sold.
Here is the solution.. Download calibrating program called TouchFWTools for tipo instal it lay it on flat surface press calibration and problem is gone.. Glad to help 
now phone not charging .
Horrible Experience with sony mobile.
very poor performance by sony.
Dear all,
I am using Xperia TIPO dual for last 8 months.I had also face the same problem and after searching on google found a perfect solution for it.
Search " TouchFWTools" on Google and install it on ur phone.
Keep ur phone on flat surface and touch "Calibrate" button in that app.
Plz dnt move ur phone during calibration.
Enjoy touch experienc like heaven..100% gurantted.
I am using it as same...send me thanks to [email protected]
Speaker not working properly
i am very disappointed with this phone
You have to elaborate, you might want to take it to a Sony repair center
How to replace my phone.
waiting for reply