marcosxd said:
update it, we don't know when or if the system is going to be hacked, why miss all the features?
You didn't even ask him if he has a flash card. Don't guinnie pig the guy. Do not install any updates if you have a flashcard. Wait until others with more experience have done it. Don't ever update if you are running homebrew unless you know EXACTLY what the update does.
If this is an old update, refer to the forum for problems, flashcard updates and safety issues. If this is a brand new update, be patient. Unless a particular game requires it, or you want the features of the new update, never blindly update your 3ds, or any DS for that matter.