Originally Posted by pete4k
First of all new USB 3 port cost about $14 and could be replaced by user in about 30 min even if you don't have 1 yr warranty.
I hate giving a reply that doesn't really help the OP, but I can somewhat sorta agree with this comment. Sorta.
Because I got the Note 3 now but haven't broken its port yet.
However I did have the Note 2 and the Galaxy S2 and there was that issue if you're careless. Sloppy plugging and stress, sometimes a few drops of water falling on the port too and shorting it, etc. Anyway, I'm very unskilled and clumsy regarding basic electronics repairs but still managed to replace the USB board on the S2 with Ebay parts. It was less than 20 USD, the board and a kit of screwdrivers. It really is very easy to replace that part if you damage the USB port (getting the infamous "charging / not charging intermittent warnings, even when the phones are not connected to anything).
I seriously doubt the N2 or N3 are much more complex. (I used repair videos on YouTube for the S2, I'm sure they will pop up for the N3 if relevant)
Not so with other components (Screen, for instance). So take some care with it and don't worry too much because even home-repair is fairly accessible and cheap in that case.