Once inside:
Older YouTube videos might show an old button sequence that no longer works on newer firmware revisions. If your radio has the latest software (usually found in units built after mid-2024), here is the updated procedure:
If that doesn't work, try the secondary method used on some production runs:
You will know you are successful if the screen changes to a black background with white text, showing hex addresses (e.g., 1. 0x00A: 128). anytone at5555n ii service menu updated
The AnyTone AT-5555N II (a 10/12 meter AM/FM/SSB/CW mobile transceiver) has a known engineering/service menu used for calibration. The updated version you mentioned may refer to:
If your radio has performance issues (off frequency, low power, distorted audio), do not attempt DIY alignment. Instead:
✅ Send to a qualified CB/ham radio technician with a service monitor
✅ Contact AnyTone/Retevis support for official firmware or alignment software (some models use PC software via USB)
✅ Check if your radio just needs a factory reset (usually via menu option or holding two buttons on power-up) Once inside: Older YouTube videos might show an
The original service manuals had errors, such as:
Radio forums (e.g., Transmission1, WWRF) contain user-consolidated updated tables, but these are often contradictory. No official updated service menu release exists from AnyTone – they do not publish service menus publicly.
If the radio displays "------" or random numbers, the PLL has lost lock. While holding those two, power on the radio
Unlike the old menu which used cryptic numbers, the updated AT5555N II uses a hybrid system of Parameter Numbers (P-xx) and Value fields.
Warning: Accessing the service menu allows modification of transmit frequencies, power output, and deviation limits. In many jurisdictions, operating this radio on frequencies outside the 10-meter amateur band (28.000–29.700 MHz) without the appropriate license is illegal. Furthermore, improper adjustment of alignment parameters (such as TX power or PLL voltage) can result in hardware damage, RF burns, or interference with emergency services. Proceed at your own risk.