Acer Predator Connect X5 5G CPE User Manual page 26

7.7
SIM PIN Management.
SIM PIN is a password used to control the rights of using a SIM card,
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and prevent unauthorized users from using it. You may also change the
SIM PIN by clicking the Change SIM PIN button. Do note that if you
fail to enter the correct SIM PIN code 3 times in succession, the SIM
card will be locked. You can unlocked the SIM card by entering the PUK
code. If you do not have the PUK Code, please contact your 5G / 4G
cellular provider. Please be advised, if you fail to enter the correct PUK
code 10 times in succession, the SIM card will be locked permanently.
Note: if user enables SIM PIN. The router will not connect to 4G/5G network
automatically until user enter PIN code when every time router boot up.
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