Hello iam getting my 536 returned from uniden , I had one of the first ones out the door. First couple hundred , it will be a refurb with a new sd card. ( iam guessing ) iam not sure what software will be in it cause the receiver is is transit should I do update when I get back ? If the old version is in there I still had p25 issues with nyseg , the only system that sometimes would here things and sometimes you hear nothing at all , it did seam to work more consistent when I did location search with the database on . When scanning my FL From RR I had min transmissions, before this new update , the rest of the receiver had worked ok for me !! That was the old 536 ,, should I use the new one out now ??