Working with no network
Nothing special to switch on. When the connection goes, the dashboard keeps working from a copy on the device, and everything you do queues until it can send.
The chip is the only thing that changes.
What still works
Everything you read, and almost everything you write. Take an order, add items, move a status, record a payment, add a customer, load a machine.
Orders created offline get their reference immediately, minted on the device from a range the server never issues — so it cannot collide with one the server gives out later.
What does not
Anything that needs somebody else's system in the moment: sending an SMS, emailing an invite, funding your balance. Those wait.
If two people changed the same order
Changes are compared field by field, so two people editing different things on the same order both land. If you both changed the same field, the dashboard tells you and asks which to keep — it does not silently pick one.