Hi!
Although I'm not entirely sure what you wish to accomplish, I've included the link to the UM425 owners manual.
If you're trying to enter your MMSI number (Page E-26), be aware that it can only be entered TWICE! After that, you must send the radio to Uniden to be reset.
That info is located at the link as well.
Hope this helps you out.
-Steve
http://www.uniden.com/content/ebiz/uniden/resources/ownersmanuals/UM425om.pdf
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