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As a square "owner" you do need a phone signal for the transaction to be processed. The delay in processing on a plane is fine as you have a "captive" market. Payment doesn't go through you have the persons details. On a market stall etc how do you chase somebody up if the transaction doesn't go through at the time?No Bluetooth is a direct connection between the two devices, no need for a mobile signal. I just can't image you need a mobile connection to take the payment. I'd think the app would store the payment data and send it to the bank when the phone had signal. I don't know this, I just can't fathom that it hasn't been thought of and dealt with by the people who make these little mobile card readers.
Like when you pay by card on a flight, the payment isn't actually processed until after the plane has landed and all the mobile devices can get signal again.
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