How do i lock the sim card on CITYCALL I8550?

How do I lock my sim card on CITYCALL I8550?

How to activate SIM lock protection in CITYCALL I8550? How to set up a PIN in CITYCALL I8550? How to use PIN protection in CITYCALL I8550? How to change the PIN on a SIM card in CITYCALL I8550? How to disable PIN protection in CITYCALL I8550? 
Do you know how useful is PIN protection in CITYCALL I8550? In the instruction below, we show you how to smoothly set up SIM lock in CITYCALL I8550. If you would like to use the PIN in CITYCALL I8550, then stay with us and learn how to use settings to activate SIM lock protection in CITYCALL I8550. Follow our tutorial and lock your SIM card easily.

1. At the very beginning, unlock your CITYCALL I8550 and get into Settings. 
2. In the second step, select Security & privacy.
3. Afterward, go to More settings to get into advanced options.
4. Now, pick Encryption and credentials.
5. This is the time to click on the Set SIM Lock 1.
6. After that, turn on the Lock SIM card by the switcher.
7. In the final part, type your own SIM card PIN.
8. Perfect job! SIM card PIN has been activated.

How do i set a lock my sim card on CITYCALL I8550? - HardReset.info

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