@jones70: Please can you confirm the model number and current Android version of your device, located in Settings > About Phone? Can you clarify why you're unable to select the contacts i.e. are they greyed out? Do the affected contacts contain phone numbers, and are they stored in the same location as the 15 contacts you were able to add successfully? For instance, are some contacts saved to a Google or Samsung account, while others are stored on your SIM card?