Verify NFC is enabled in Android settings: go to Settings > Wireless & Networks > More, tap on the NFC switch to activate it. Then go back to Golf Pad and try scanning a tag again.
If you are unable to scan tags still, please send a message to our support team and we'll work with you to get the issue resolved.
If you see an error message of "invalid tag", please tap "contact support" when the dialog message appears and follow the steps. This will send us the information we need to activate your tag.