So wait, when does the update nag happens?
Are you safe if you don't open the browser?
Some friends are trying to downgrade and install CFW, however, it seems the browser gets an update notification via spotpass or something.
Had the same last week.. If you get the nag the first time you can pull the battery out or try and power off before it forces a restart. I didnt know this so didnt prepare. Once the nag is on a 10.1 O3DS you cannot do anything with the browserhaxx, you need to use OOTHAX like I did last week. You need another 3ds running CFW to install the payload for 10.1 on OOTHAX on the cart though, luckily i have more than one.
Not working on my 10.1 O3DS XL. I have seen the update message before, am I screwed?
See above, you need to get the 10.1 payload onto OOTHAX via another machine. Or you can get to 10.3 using some method but I am not sure if any carts shipped with 10.3? Good luck