"The PRO-2006 possesses latent capability to tune the frequencies
    "wired out" at the factory.  To regain continuous coverage from
    760 MHz through 1300 MHz, all you have to do is unplug the set from
    the powerline, then:

    1. Remove the plasic top cover from the radio.
    2. Look behind the numeral "3" key, inside the front panel, and you
       will see two diodes and blank spots for two more.  Locate D-502;
       the lower of the two visible diodes.
    3. Snip the exposed, upper leg of D-502; push the two cut ends
       slightly apart.
    4. Button the case back up and be content with the continuous
       frequency coverage of 25 MHx-520 MHz and 760 MHz-1300 MHz.

    Next, press the STEP key three times while in any SEARCH mode,
    you will see, successively on the LCD Display, the step or increment
    indications of "5" kHz," "12.5 kHz" and then "50 kHz."  Press the
    STEP key a dozen times or a hundred, and only the above three
    increments will be displayed.

    Now , if you have restored the full frequecy capabilites in your
    PRO-2004, 2005, or 2006, and first press the RESET key, then just
    as soon as a SEARCH enters the frequency ranges of 825-845 MHz
    and/or 870-890 MHz, you will see a 4th increment displayed:
    "30 kHz"! It's OK! This is appropriate for the spacing in those
    bands.

    However, keep in mind:

    1.  It is illegal to listen to cellular telephone conversations.
    2.  Modifying your PRO-2006 will invalidate the manufacturer's
        warranty.
    3.  If you blow up your scanner, no one will sympathize will (sic)
        you.

It worked for me.  Good luck, it is a nice radio.

Stephen