It may be useful to change the PIN code of a newly purchased iPhone (if the PIN set to 0000 by default for example) or for safety reasons to protect from fraudulent use of your phone in case of theft.
How to Change The PIN Code on Your iPhone
To change the PIN code on your iPhone follow these simple steps.
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- Go to Settings then Mobile Data.
- Click on SIM PIN then Change PIN. To change your PIN, you will first have to enter your current PIN code to gain access.