If and when you get the XT, I suggest you first get FreeSCAN (a free software, donations welcome, but not required), if you have not already, and
1. download all the contents of the new 396XT into FreeSCAN; save the file for future reference or use
2. download the contents of your 396T into FreeSCAN;
3. modify/update the 396T file as you wish, such as including your statewide APCO 25 system from the file in step 1 above; save file.
4. then upload the saved/modified 396T file into your new 396XT (choosing option in FreeSCAN to delete what’s in the 396XT before FreeSCAN uploads into scanner.)
There are some new features in the XT that the T does not have, such as programming multiple sites in one system.
Only thing you might have to do to make things easy is to get the Uniden USB-1 transfer cable (USB to Uniden mini USB), if you are not already using it. Be sure to download and install the most resent driver for the USB-1… ; install driver FIRST, then plug in USB-1 cable, as per instructions.
The beauty of FreeSCAN is that it can be used interchangeably for both Uniden scanners (and for some of the other Uniden scanners).. That is, for example: what you have in the 396T can be loaded into directly into the 396XT without any changes in the 396T’s programming, but from 396XT to 396T, you may have to make adjustment,… like the 396T does not do multi-site programming.
For myself, (I do not know if anyone else has to do this) I have to save and CLOSE FreeSCAN after making any modifications, then open the file before uploading into scanner, otherwise, I get an upload error.