My apologies, my image seems to not have uploaded.
If you were to, go to:
1. Settings
2. Touch ID & Passcode
3. Enter your passcode
4. Click change passcode
5. Enter old (current) passcode
6. Instead of entering NEW passcode, click Passcode Options
7. Choose alphanumeric passcode
After doing so, in order to unlock your phone, you’re now required to enter the alphanumeric passcode you just created
My issue is that, I never created a new passcode. After restarting my device, I am now required to enter an alphanumeric (never created), instead of entering my 4-digit Passcode!