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You could flash a custom ROM but your current phone it's a bit old and like I said, apps are getting heavier and more hardware demanding.
I'm sorry to say this, but there's nothing anyone can do, check the XDA Forum, you might be able to find custom ROMs
Also, there won't be any further updates for this phone, the last update was more than 2 years ago. The phone was released 3 years ago.
Xperia Tipo
http://support.sonymobile.com/global-en/xperiamiro/software/
You may already have the latest software, depending on the date of purchase. Software updates are released at different times depending on operator and/or country. Therefore, we cannot give you an exact date for when a specific update will be available for your device.
Android version: Android 4.0 (Ice Cream Sandwich)
Latest available software: 11.0.A.5.5
Release started: 2013-03-04
Xperia Miro
http://support.sonymobile.com/global-en/xperiamiro/software/
You may already have the latest software, depending on the date of purchase. Software updates are released at different times depending on operator and/or country. Therefore, we cannot give you an exact date for when a specific update will be available for your device.
Android version: Android 4.0 (Ice Cream Sandwich)
Latest available software: 11.0.A.5.5
Release started: 2013-03-04