According to the Android phone system requirements, the default PIN code is 0000 in most cases, and 1234 or 16 zeros in special cases.

If you encounter a problem where your device cannot be found, please check the following: 1. Confirm that your phone's Bluetooth is enabled. 2. Restart your device or the app and try searching again. 3. Turn your phone's Bluetooth off and on again. 4. If the above steps have been ruled out and your problem persists, please contact NIIMBOT official customer service for assistance.

1. Check whether the label paper is placed correctly. The label paper should be exposed 0.5 cm from the machine. 2. Check whether the label paper or carbon ribbon is exhausted. If so, please replace it in time.

Please follow the APP abnormal prompts to solve the problem.

1. Please restart your device or the app and try searching again. 2. Please turn your phone's Bluetooth off and then on again to try connecting. 3. If the above methods do not resolve your issue, please contact NIIMBOT official customer service for assistance.

If you encounter unclear printouts, you can perform a self-check using the following methods: 1. Confirm that you are using official NIIMBOT label paper. This machine only supports official NIIMBOT label paper. 2. Try pressing the power button once to feed one sheet of paper and then printing again. 3. Double-click the power button to print a self-check page. Take a photo of the self-check page and send it to customer service for assistance.

1. Check whether the label paper size matches the APP template. 2. The printing offset can be adjusted through the APP editing function.

1. Check if there is label paper or foreign matter stuck on the paper guide sensor of the paper bin. 2. Check if the template size set on the APP is consistent with the actual size of the label paper. 3. Check if the paper type set in the template is wrong. 4. If the above problems are excluded, it is a detector failure. You can contact customer service for feedback and resolution.