I want you to reset all of my settings please

If you want to reset all your settings on your iPhone, go to:

Settings → General → Transfer or Reset iPhone → Reset → Reset All Settings

This will not delete any content on your iPhone, but will only reset your settings.

You can find more useful information here:

Return iPhone settings to their defaults - Apple Support

If you have forgotten the passcode for your iPhone, then unfortunately there is only one way - it must be restored to the factory settings. This will erase your entire iPhone, and not just the settings.

You can see how to do a Factory Restore without a computer here:

If you see an iPhone or iPad unavailable message or Security Lockout screen - Apple Support

If you want to do a Factory Restore from a computer, see here:

If you forgot your iPhone passcode - Apple Support

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What do you mean that your phone has decoding?