Understanding SIM Card PIN and How to Set It on iOS and Android

Recent reports have highlighted how thieves can steal a lost phone, extract personal information from government apps, and use it to obtain loans, prompting the Ministry of Industry and Information Technology to advise users to set a SIM card password (PIN) to safeguard their data.

What is a SIM card PIN? It is the personal identification number for the SIM card, usually set to the default "1234" on first use. Once configured, the phone will prompt for the PIN each time it powers on, preventing unauthorized access.

Enabling a PIN ensures that even if the phone is lost or stolen, criminals cannot retrieve personal information or financial assets through simple "phone number + verification code" methods.

How to set the PIN on iOS: Open Settings → Cellular → select the desired number → SIM PIN → toggle the switch → when prompted, enter the original default PIN (usually "1234") → input a new four‑digit PIN to complete the setup.

How to set the PIN on Android: Open Settings → Security → More security settings → Encryption and credentials → Set SIM 1/2 lock → tap the lock button → when prompted, enter the original default PIN (usually "1234") → input a new four‑digit PIN to complete the setup.

If you forget the PIN, the SIM will be locked after three incorrect attempts, requiring a PUK code from the carrier to unlock.

For further assistance, users are encouraged to like, share, and follow the article for more security tips.