d2hhg3

We have a Ge Orion Model D2HHG3 and are wondering if it needs upgrading for narrowband. I posted this elsewhere before looking and seeing theres a Ge etc forum here. And the nice person who responded said yes but to look here for a more proper answer. Thanks in advance

Anyone know how you can tell if the radio has the narrowband option in it? Radio is Model Number D2HHG3.....Wondering if it needs to be upgraded i know some have it in reading the web...