Reader errors

• Why did my payment say "Collection timed out" or "Reading the card timed out"?
• What does "The card is not supported by the current reader's configuration" mean?
• Why does Tap to Pay say "The card reader cannot be used while a phone call is active"?
• My card reader says I'm in TESTMODE ONLY, how do I fix this?
• Tap to Pay shows "Default" instead of your business name
• My card reader says connected, but nothing happens when I charge
• My card reader isn't found, won't connect, or keeps disconnecting