While the codes listed below are generally safe for the Nokia 106 (2023 model and previous iterations), you proceed at your own risk. Avoid changing settings in engineering menus unless you are sure of what they do, as this could affect your phone’s performance.
This opens a service menu showing:
This is the universal code for all GSM phones. The (International Mobile Equipment Identity) is a 15-digit serial number unique to your phone. How to Use Secret Codes on NOKIA 106
*#7370#
Some Nokia 106 models (especially 4G variants) have a basic noise cancellation feature for calls. This code toggles it on or off. Try it if people complain that you sound muffled or too echoey. While the codes listed below are generally safe