Guide_3DS/_pages/es_ES/include/cfw-check-fredtool.txt

As an additional safety measure, we will perform an additional check for custom firmware. This is because using this method when custom firmware is already installed has a risk of bricking the console (rendering it unusable without recovery methods like [ntrboot](ntrboot)).

1. Apaga tu consola
1. Mantén pulsado el botón (Select)
1. Enciende la consola mientras mantienes presionado (Select)
1. If the check was successful, you will boot to the HOME Menu and you may proceed with this guide
1. Apaga tu consola

If you see a configuration menu or the console immediately powers off, you already have CFW, and continuing with these instructions may BRICK your device! Follow [Checking for CFW](checking-for-cfw) to upgrade your existing CFW.
{: .notice--danger}