Use this guide to resolve common issues with your SwipeSimple Terminal device (PAX A920, A920 Pro, A80, and Aries).
Connecting to WiFi
- From the terminal home screen, tap the Settings icon.
- When prompted for a password, try one of the following: 9876, pax9876, or pax9876@@
- Select WiFi or Network settings.
- Choose your WiFi network and enter the password.
- A fully shaded WiFi icon at the top of the home screen confirms a successful connection.
App Frozen or Not Responding
- Tap the square icon at the bottom of the terminal screen. A list of currently running apps will appear.
- Find SwipeSimple in the list and swipe right to close it.
- Tap the circle icon to return to the home screen, then reopen the SwipeSimple app.
If a transaction was in progress when the app froze, after restarting SwipeSimple check whether the transaction was completed before confirming a new charge with the customer.
Unable to Log In
If you cannot log into the SwipeSimple app on your terminal:
- If you need to reset your password, visit: How do I change or reset my password
- If the error says “Device not connected” or “Unable to resolve host,” the terminal is not connected to the network. Follow the WiFi connection steps above.
- If the terminal has a working network connection but still will not log in, check the timezone settings on the terminal. Some devices ship set to China Standard Time, which can prevent login. Go to Settings → System → Date & Time and toggle Automatic Date, Time, and Timezone to on.
Receipt Printing
If receipts are not printing:
- Reverse the terminal and pull the lever at the top to open the paper roll chamber.
- Confirm a paper roll is loaded with the roll spooling upward. Remove and reinsert if needed.
Note: Receipts reflect the timezone set on your PAX device. To update, go to Settings → Date & Time and adjust the timezone.
Tap to Pay Errors
If tap transactions are failing, check the following:
- Wait for the terminal screen to prompt you to tap before presenting the card. Tapping too early will cause an error.
- Tap the card at the back of the terminal on the tap icon — not the front screen.
- Remove the card promptly when prompted. Holding the card too long will cause an error.
Note: Tap to pay transactions may have transaction limits imposed by the backend terminal configuration. If transactions over a certain dollar amount are being declined while other methods like dipping authorize without issue, contact your Merchant Service Provider to review the file build on your terminal.
Error: “Previous Transaction Still Processing”
If SwipeSimple shows a message indicating a previous transaction is still in progress when no transaction is active:
- Log out of the SwipeSimple app.
- Log back in. This clears the error and restores normal transaction processing.
Error: “Cannot Process Transaction with Selected Merchant Account”
If SwipeSimple displays an error indicating it cannot process transactions with the selected merchant account:
- Open the sidebar menu by tapping the menu icon in the top left corner of the SwipeSimple app.
- Tap Settings.
- Tap Device Settings.
- Tap Merchant Account.
- Select the merchant account associated with your terminal’s serial number.
Network and Connectivity Errors
If you see a DNS error or a message about inaccessible URLs, your network may be blocking SwipeSimple. Ask your network administrator to whitelist the following URLs:
- api.swipesimple.com
- api.cardflight.com
- api.getcardflight.com
Daily Reboot
PAX terminals are programmed to reboot once per day. This is expected behavior and cannot be disabled, but the reboot time can be rescheduled to a time the suits your business operations.
To reschedule the reboot time from the terminal:
- Go to Settings.
- When prompted for a password, try one of the following: 9876, pax9876, or pax9876@@
- Tap Security & Location.
- Tap Enable Scheduled Time Reboot.
- Set your preferred reboot time.

