A : The possible reasons are as follows.

① Phone or Device-Related Issues

• Bluetooth not enabled: Check if the Bluetooth function on your phone is turned on.
• Too many Bluetooth devices: A Bluetooth printer can only communicate with one device at a time. Check if multiple Bluetooth devices are connected.
• Bluetooth signal interference: Other Bluetooth devices or electronic devices may interfere with the signal. Try turning off other Bluetooth devices nearby.
• Bluetooth driver issues: The Bluetooth driver on your phone or printer may need to be updated or reinstalled.
• Bluetooth service issues: The Bluetooth service on your phone may be disabled and needs to be enabled in the settings.
• Device compatibility issues: Ensure that the Bluetooth version on your phone is compatible with the printer.
• Device pairing issues: Ensure that your phone and printer are correctly paired. Sometimes, a specific pairing code needs to be entered on the printer.
• Device distance issues: Ensure that the distance between your phone and printer is within the effective Bluetooth range.
• Device battery issues: The printer’s battery may be low and needs to be charged.

② Printer-Related Issues

• Bluetooth not enabled on the printer: Confirm whether the Bluetooth function on the printer is turned on.
• Incorrect printer firmware version: The firmware version of the printer may be incorrect, preventing connection.
• Printer not in connectable mode: Ensure that the printer is correctly set to be discoverable and connectable.
• Incorrect printer Bluetooth name: The Bluetooth name is incorrect, and you may have connected to the wrong Bluetooth device.
• Printer settings issues: Check the Bluetooth settings options on the printer to ensure they are correctly configured.

③ Other Issues

• App issues: Ensure that the printer app is correctly installed and updated to the latest version.
• Network issues: Check the network quality and whether the network settings are correct.
• Device permission issues: Confirm that the device allows Bluetooth connection with the printer. Check the Bluetooth permission settings in the device settings.

④ Solutions

• Re-pair the device and printer: Unpair the printer from the device, then search for and pair it again.
• Restart the device and printer: Turn off and then turn on the printer power. At the same time, restart the phone or device.
• Update Bluetooth drivers and firmware: Check if the Bluetooth drivers for the device and printer need to be updated.
• Check Bluetooth signal strength: Ensure there are no physical obstacles between the device and printer, and try to place them closer to each other.
• Use a dedicated printer application: Download and install the dedicated printer application software Fun Print.
• Check printer settings: Ensure the printer is correctly set to be discoverable and connectable.
• If the app cannot connect to the machine, you can double-click the power button to print a test page, which has a QR code. Scan the QR code with a browser. If the app cannot be downloaded normally, it means this machine is not for connecting to the app. Please contact the customer service of the seller where you purchased the machine to resolve the issue.
• Contact technical support: If none of the above methods can solve the problem, please contact after-sales customer service or technical support personnel for assistance.