SE K2xx phones use a different PA than GTA0x/FCDEV3B, so the compiled-in Tx ramp templates must match the actual hardware. Replace the previously copied GTA0x ramps with values extracted from the SE K2xx official firmware using the calextract tool from the freecalypso-reveng repository:
Set afc_slope to 405 and afc_initial_dac_value to -370, derived from AFC parameter averages computed across TIFFS readings of 7 unique SE K2xx units (5 x K200i + 1 x K205i + 1 x K220i).