aaaa    counter for MDI_NO_PSW_FOUND message received from DSP
                in hexadecimal form.

        bbbb    counter for synchronization measurement attempts in decimal
                form. If counter value is over 9999 then four x are shown.

        cccc    counter for cell reselections in hexadecimal form.


    On poweroff the values of the counter displays are stored onto the EEPROM,
    where they will be read during power on. To initialize the counters to
    zero, select display 60. Counters are automatically reset to zero when
    they exceed their maximum value.