: If successful, the display will change to show the service menu items (e.g., beginning with modulation modes or specific channel codes like "FM" or "01"). Service Menu Operations
Alternative Method : Some versions use a sequence of pressing all 6 buttons from to EMG after the initial boot. Key Settings and Navigation anytone at5555n ii service menu work
: Press and hold the MENU and MODE buttons simultaneously while turning the radio on. : If successful, the display will change to
Once inside, rotating the navigates through the parameter columns, and the UP/DOWN buttons (or sometimes the VR knob depending on firmware) adjust the values. Once inside, rotating the navigates through the parameter
If your goal isn't fine-tuning but simply expanding the frequency range (e.g., to include the 11-meter CB band), a different shortcut exists: turn the radio on while holding and EMG , then switch between "BAND 1" and "BAND 2" using the channel knob. Anytone 5555n Ii Service Menu - Google Groups
: Hold down the FUNC button and turn the radio on. While still holding FUNC, quickly press the following buttons in sequence: RB , then NB , then DW .