Later, if you have already downloaded "message backup contacts +", then the options / settings menu will appear in a new menu called "contacts + message backup". Thus, it should be known that the application system will not appear in the application list or in the main screen.
"contacts + message backup" will be able to make backups of all the phone book, SMS and MMS along with attachments that you have and will be stored in external memory / SD-Card in the folder "backup + restore". The format used for backup result is a list of telephone VCF format. While the for SMS and MMS using the XML format.
Keep in mind, the current application system "contacts + message backup" only supports Lumia Windows Phone 8.1 which has an external memory slot / SD-CARD. If you do not have a slot Lumia external memory / SD-CARD, it will be useless if you do download this application because the system can not be used.
Lumia Windows Phone 8.1
Special Lumia with external memory / SD-Card
Download Link ;
"contacts + message backup" for Lumia Windows Phone 8.1