Forgot passcode to an old iPhone 6s

First, you don't have to type in caps, because it looks like you are screaming and this is not very nice.

Second, follow the steps from the article below to enable your old iPhone 6S:

If you forgot the passcode for your iPhone, iPad, or iPod touch, or your device is disabled - Apple Support

FIREFIGHTER332 Said:

"What Do I Need to Do When I Forgot Passcode To an Old iPhone 6S"

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CAREFUL: Don't log in incorrectly too many times, as you will be locked out of your iPhone from then on out. As of this date... getting locked out, is just the way it is :(