Instructions to obtain the serial number on Blue devices

How to find the serial number on Blue devices for free. Instructions to show the serial number on a Blue smartphone, tablet or smartwatch to sell it, report its theft, find out if it is original or use the guarantee. Search for your device among the wide catalog of 3 available devices.

Blue Gate BG3 Blue Gate BG3
Blue Gate BG4 Blue Gate BG4
Blue Gate BG4I Blue Gate BG4I