Why is the heart rate display on the main screen showing a blank or no numbers?
If the heart rate display on your MT55 smartwatch is not showing numbers, please check the following troubleshooting steps based on the user manual:…
Manuals+ Q&A
eBay MT55 1.43 Inch Amoled Display Smart User Guide — questions & answers
Read product questions and troubleshooting answers linked to eBay MT55 1.43 Inch Amoled Display Smart User Guide.