It doesn't not require FMIP to be off. Follow these instructions:
- Disconnect all cables from your device.
- Hold down the Sleep/Wake button, then "slide to power off" to turn off your device.
- Press and hold the Home button and plug the device into your computer. If your device doesn't turn on automatically, turn it on. Don't release the Home button.
- Continue holding the Home button until you see the Connect to iTunes screen.
- If iTunes doesn't open automatically, open it. iTunes will alert you that it has detected a device in recovery mode.
- Click OK. Then restore the device.
If your device doesn't go into recovery mode, try steps 1–4 again.
[Text from Forgot passcode for your iPhone, iPad, or iPod touch, or your device is disabled - Apple Support]
-Ethan