If you use an iPhone, you know that it uses either a 4-digit or 6 digit PIN to unlock the device. Well, there’s a way to switch it up and make your device just a little more secure by switching to a combination of letters and numbers which increases your number of passcodes exponentially.
First, you need to find Settings on your iPhone.
Select Touch ID & Passcode.
Tap Change Passcode.
Choose Custom Alphanumeric Code.
Then enter a combination of letters and numbers for your passcode.