HTC Desire 4G LTE User Manual page 86

86 People
Restoring contacts
You can only restore contacts that were backed up using the export option in the
People app.
1. On the People tab, tap
2. Choose whether to import contacts from the storage card or phone storage.
3. If you have more than one account set up, tap the type for the imported
contacts.
> Manage contacts > Import/Export contacts.