SIM Lock is an additional layer of security that you can use, along with the classic iOS Passcode and more recent Touch ID sensor. Every smartphone needs a SIM card in order to be able to connect to the carrier and receive an allotted phone number. Each SIM has its own Passcode, called PIN code. Whenever you buy a new SIM Card, it comes with a default PIN code, used for activating it.
How To Enable/Disable SIM Lock
You can opt that your iPhone requests the PIN code whenever it’s rebooted, or not. Failing to provide the 4-digit string results in a temporary Sim Lock, which can be lifted by entering the SIM card’s PIN. This might prove itself annoying. However, if you type the wrong PIN more than 3 times, your SIM card is permanently locked and can be recovered only with the PUK code.
You can remove PIN code requests by disabling SIM Lock from the Settings app. However, this espouses your SIM cards info in case of thefts. If an unauthorized person gets his hand your iPhone and extracts the SIM card, you might experience a data leak, because the SIM can be used with another smarptohne, if SIM lock isn’t available.
Fact: To teak this feature On/Off please browse to: Settings -> Phone -> SIM PIN. Tweak the toggle next to SIM PIN to activate or deactivate this security element.
How To Unlock iPhone SIM Card
If the SIM card security setting is active, you’re asked to insert the PIN code whenever the iPhone restarts. If you fail to do so, the SIM locks, and you aren’t able to receive or dial Cellular data calls or send messages. Your iPhone can remain connected to the web as long as you’re in the range oft a Wi-Fi hotspot. This means that you can use FaceTime and iMessage.
To Unlock the SIM card, open the Phone app and tap on the Recents tab, available in the bottom-left area of the screen. The SIM Locked pop up will show up on your screen to notify you that you aren’t able to dial calls, until you don’t type the 4-digit PIN code. Enter it and you’re iPhone unlocks!
Fact: Be careful what security code you use! You have only 3 attempts. If you fail to enter the correct PIN, your SIM will lock permanently and can only be unlocked with the help of the PUK (PIN Unlock Code).
Tip: All SIM cards come with Default PIN codes. The most common 4-digit combinations are: “0000” or “1234”. If you want to use the SIM lock, I strongly recommend you to modify the default password and keep your iPhone safe.
How To Change SIM card PIN
Grab your iPhone and open the same Settings app. Tap Phone and scroll for SIM PIN. Next, hit Change PIN. You’re asked to type the current code. Once confirmed, you can proceed with adding your new SIM security code. Confirm it by entering it for a second time and you’re ready to go!