The Sony Xperia U Recovery not only recover deleted contacts, SMS on Xperia U, but also documents, media files for you.
Sony Xperia Phone data Recovery [Windows & Mac]: http://www.android-data-recovery.org/android-data-recovery
I recommend you try the best Xperia U data recovery program - Wondershare Dr.Fone for Android, which can help you recover deleted files from your Sony Xperia U in just one click, such as contacts, SMS, videos, photos, and music, documents.
With help of the Sony Xperia U File Recovery program, the only thing you need to do is install the program on your computer and run it to bring up the starting window. Then please follow steps in the video tutorial above to complete the task in click.