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

1. Restart the machine or app and search again 2. Turn off the Bluetooth on your phone and turn it back on

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

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

Due to the functional limitations of the Android phone system, positioning must be enabled to use the Bluetooth function.

1. Check if the Bluetooth function of the mobile phone is turned on 2. Restart the machine or APP and search again 3. Turn off the Bluetooth of the mobile phone and turn it on again

1. Confirm whether the label paper used is the original NIIMBOT label paper. 2. You can click the power button to feed one sheet of paper and then print again. 3. Double-click the power button to print the self-test page, take a photo of the self-test page and send it to NIIMBOT after-sales customer service for feedback and resolution.

Please follow the APP abnormal prompts to solve the problem.

1. Check if there is any 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 of the template setting is incorrect. 4. If the above problems are excluded, it is a detector failure. You can contact customer service for feedback and resolution.