Microsoft Lumia 640 XL - Change your PIN code

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Change your PIN code
If your SIM card came with a default PIN code, you can change it to something more secure.
Not all network service providers support this feature.
1. Tap >

> settings.

2. If you have a dual SIM phone, select the SIM you want. Dual SIM is not supported by all

phones. For availability, go to

3. Tap change SIM PIN.
The PIN code can be 4-8 digits.