It is normal practice to protect the contacts by saving and exporting the contacts to the storage. But, in case some of the contacts in phone book are destroyed or deleted by mistake or unintentionally, you may feel the need to import contacts from the storage. You may do so easily.
If you feel any need, see the instructions.
1: Tap icon of the ‘Phone Dialer’ app on the Home screen of your Android 5.1 Lollipop device to open up the ‘Phone Dialer’ app screen.2: At the ‘Phone Dialer’ app screen, tap the settings button, placed on the top right corner of the ‘Phone Dialer’ app screen. It will open up a popup menu.3: Tap the ‘Import/export’ in the popup menu. It will open up a prompt, displaying the 4 options.4: Tap the ‘Import from storage’ in the prompt.4: Here, you will see a message that Android is searching for the vCard data on the SD card. After few seconds, it will stop, indicating that contacts are being copied to the internal storage / phone book of your Android device.That’s all!