My phone's memory is almost full. And I have noticed that there is a lot of wasted space because of the useless preinstalled apps. They can't be erased. And I alredy know the answer for the most common question : "no, They can't be uninstalled"
But, I would like to request for information of somebody at Sony or an oficial developer who can make a tool to release that space and/or get rid of those anoying pieces of "software"
PD: Make the Phone root is not an option because of warranty.