How to reset code restriction
Name phone: iphone 5 16gb Model: ND297TA/A Memory internal: 16gb
iPhone 5, iOS 10.3.3, Please help me to settle reset code
See the following from Use parental controls on your iPhone, iPad, and iPod touch - Apple Support
If you forget your Restrictions passcode, you need to erase your device, then set it up as a new device to remove the Restrictions passcode. Restoring your device using a backup won't remove the Restrictions passcode.