Unless you scanning the phone to return the lost contacts on the phone , otherwise , there are not any solution for your problem , don't worry , scanning the phone device will not bring any harm to your phone , which is directly enter the phone and get back you lost contacts on the phone , http://www.android-rescuer.com/recover-contacts-from-android-phone.html
Как вернуть пропущенный звонок?
Unless you scanning the phone to return the lost contacts on the phone , otherwise , there are not any solution for your problem , don't worry , scanning the phone device will not bring any harm to your phone , which is directly enter the phone and get back you lost contacts on the phone ,
http://www.android-rescuer.com/recover-contacts-from-android-phone.html