You might have experienced a loss of data and multimedia files on your computer but hearing about the same loss occurring to your phone is probably new. Just like the computer, the mobile phone is a device with the chances of data corruption.
This is the main reason why Mobile Phone data recovery software has been released. Mobile Phone data recovery software is the ultimate recovery software for data previously stored on your mobile phone. You will be able to connect the memory card where the data where hosted.
As you noticed, the recovery only involves multimedia files and regular documents not your contacts and other SMS. The recovered data can be saved to a new destination if you want. Mobile Phone data recovery software is pretty accurate though and should be considered.