TP-Link M5350 User Manual page 28

Current Status: Shows whether your PIN code function is enabled or disabled.
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PIN Function: You can select whether to enable PIN function or not. Once the PIN

function is enabled, every time you start the device with this SIM card inserted, you need to
enter the PIN code; while if you go to enable the Auto Validate PIN function, it could save
you this trouble.
PIN Code: You can set a PIN code, not more than 8 characters.
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Remaining Attempts: Shows how many attempts there are left for you to try entering the
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PIN code after you failed to enter the right one. You have 3 attempts at most. If you
accidentally fail in three attempts, the PIN will be locked and you will be required to enter
the PUK code that is written on your SIM card (as shown in Figure 4-17).
If the current status of PIN is disabled, you can select Enable PIN and set a PIN code, and then
click Apply to make your settings take effect. While, if the SIM current status is PIN enabled
and verified, you can select Disable PIN and enter the current PIN code, or select Modify PIN
and enter the required parameters to set a new PIN code, and then click Apply to make your
settings take effect.
Figure 4-16 PIN Configuration
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M5350 3G Mobile Wi-Fi User Guide