There are a few possible culprits:
 Guest's bluetooth is not enabled
 We have seen that wifi can interfere with our checkin process on some select Android devices. If possible, ask the guest to t
If these cases do come up and you want to ensure the guest gets credit, you do have the option to manually credit the guest with a visit.
Here's how to do that:
 You can do this by opening your Staff app and navigating to the Search tab.
 Find the guest's account by name
 Tap into the guest's account and tap the "Quick Actions" button.
 You'll see an option to "Add Visits" - tap that, and enter the number of visits you want to add: