Contact Backup Pro at App Store analyse

Contact Backup is the easiest way to backup and restore your contacts directly from your phone.
You can backup all your contacts with a single touch and send yourself a .vcf attachment via email.
All your contacts can easily be restored to your device at any time by simply opening .vcard file through your mailbox.

No signing in, no accounts, no activations required to take backup of your contacts. Easy to use anywhere anytime for free.

MAIN FEATURES
○ One tap to backup your contacts!
○ Offline Backup. No need to sync to any server. Just email yourself the backup file.
○ Simple Restore - just tap on the .vcf file in any device mail client.
○ Save a copy of the backup file in your Computer.
○ Backup Contacts as VCF (VCard).

So using this app you can export all of your contact and import or restore to mobile phones.