Don't forget to have a backup of your NAND in case something goes wrong so you can reflash with a nand mod later. Just in case.
Oh it's true what you say thanks
Obviously I think the back up of the nand to be saved is the 6.2.0 fw starting that now has my 3ds xl
Then I turn on my 3ds xl with wi-fi off I disable automatic updates I disable SpotPass not yet never used 3ds xl should not have problems with cache or more to clear the browser's launch 3ds xl insert the correct url to connect to the gateway exploits and so now I can turn on the wi-fi previously configured as already know (I also have a 3ds xl White 4.5.10.E native and already use the gateway)
Ok I think the procedure is correct otherwise if I wrote something wrong let me note