The register is built to keep selling even when the internet drops. Here's how it works.
Open Settings β Offline data and tap βPrepare for offlineβ while the register still has a connection. Counter downloads the products, customers, stores, settings and company record it needs for a cold start, then shows the record count and the time of the last download.
Cashiers still sign in with their user PIN while offline. While the device is online the server issues it a short-lived, device-bound PIN credential (6 hours by default); with the link down the register verifies the typed PIN on the device. Orders are stamped with the cashier's name either way.
Settings β Deployment Readiness shows when the device last synced. If it's been more than 24 hours, check the device's internet connection.