https://github.com/flipperdevices/flipperzero-firmware/tree/dev/firmware/targets/f7/furi_hal/furi_hal_subghz.c Change furi_hal_subghz_is_frequency_valid and furi_hal_subghz_set_frequency_and_path Reminder, the unofficially supported freq are 281-361 MHz, 378-481 MHz, and 749-962 MHz 281000000 - 361000000
378000000 - 481000000
749000000 - 962000000 ``` bool furi_hal_subghz_is_frequency_valid(uint32_t value) { if(!(value >= 281000000 && value <= 361000000) && !(value >= 378000000 && value <= 481000000) && !(value >= 749000000 && value <= 962000000)) { return false; uint32_t furi_hal_subghz_set_frequency_and_path(uint32_t value) { value = furi_hal_subghz_set_frequency(value); if(value >= 281000000 && value <= 361000000) { furi_hal_subghz_set_path(FuriHalSubGhzPath315); } else if(value >= 378000000 && value <= 481000000) { furi_hal_subghz_set_path(FuriHalSubGhzPath433); } else if(value >= 749000000 && value <= 962000000) { furi_hal_subghz_set_path(FuriHalSubGhzPath868); } else { furi_crash("SubGhz: Incorrect frequency during set."); } return value; ``` Don't forget to add your new freq to the user settings file (and change ignore_default_tx_region: false to true)