The My Contacts app allows you to save all your contacts from your smartphone, so you'll never lose them again!
Be it whether you switch phones, or *touch wood* lose it, keep all your contacts ... contact.
Here's how it works:
1. Download the app. (iOS / Android)
2. Open the app, and click "Copy Contacts". The app will start copying the contacts from your smartphone into the app.
3. Your contacts are now backed up in My Contacts.
4. To transfer them to another phone, open the app in the other phone and click "Copy contacts" and it will start transferring the Contacts from the app into your new phone.
Ta-da! And you're done