What do you do if you lock the SIM card?IIJ will guide you on how to deal with it on the official blog

　IIJ shows how to deal with the SIM card lock (PIN lock) on the official blog "Tekurogu" by the company's engineer.

　Nippon Television introduced a change in the lock number (PIN code) of the SIM card (PIN code) as a countermeasure against mobile phones, in the "class I want to take the world" on June 27.After the program broadcast, on Twitter and others, there were many troubles such as "SIM card lock was accidentally locked and smartphones could no longer be used."

Even if a SIM card is locked, operations other than communication can be performed by "removing the SIM card".

　The SIM card lock is just a lock on the SIM card, so if the SIM card cannot be used due to the PIN lock, it will not affect the smartphone itself.The expression is similar to the SIM lock that makes a carrier from using a terminal from another carrier or a "PIN" set as a screen lock of an Android terminal, but it is completely different.

　In the IIJ blog, if the locked SIM card is attached to the terminal, the operation may stop at startup, and in that case, "Remove the SIM card", and in the Wi-Fi communication and the smartphone.It is possible to refer to photos and use the app.

SIM card lock has a merit, but ...

　Regarding SIM card locks, there is an advantage that the SIM card is extracted when a smartphone is lost, and it can prevent it from being used overseas, but there are many points to note.In recent years, the functions on the software side of smartphones have developed, so it is hard to say that it is a function that can be recommended to others.

　If you want to set a SIM card lock for the first time, you need to enter a predetermined PIN code for each carrier.In the initial settings, docomo and Rakuten Mobile are "0000", au system is "1234", and SoftBank system is "9999".

　If you make a mistake in the PIN code three times in a row, a PIN lock will be applied, and incoming calls and transmissions will not be possible.If a PIN lock is applied, it is necessary to enter the Puk code (PIN lock unlock code).

　If the Puk code is mistaken 10 times, the SIM card will be completely disabled and the SIM card will be reissued at a mobile phone company shop.Of course, you will pay a regular SIM card reissue fee.

　The method of checking the Puk code varies depending on the career.In the case of DoCoMo and SoftBank, you can refer to my docomo or My SoftBank, respectively.In the case of au, there is no way to check online, but the Puk code is listed on the SIM card mount.In the case of Rakuten Mobile and other MVNOs, the response is different, such as needing inquiries.

　Nippon Television is on the official website of the "class you want to take in the world", "It was difficult to understand the explanation of" Smartphone SIM Card Lock "introduced as one of the digital crime measures."If you can't, please refrain from operating. "