Lock your SIM card with a PIN (personal identification number) so that an identification code is required for phone calls and cellular data usage. To stop other people from using your SIM card to make phone calls or use cellular data, you can use a SIM PIN.
Find and tap Settings → Lock screen & security → Advanced → SIM card lock. Tap Change SIM PIN.
We suggest enabling SIM card lock in the settings to add an extra layer of security to protect your SIM card on Android if your device has a SIM card slot. The SIM card lock has been on top budget Android phones for years, but many people are unaware of the feature.
The SIM PIN code is a security feature that protects against unauthorized individuals accessing your SIM card data. Some smartphone models come with this option on by default, while others need to have the feature enabled.
You can use a SIM PIN to prevent access to cellular data networks. In order to use cellular data, you must enter the PIN whenever you swap SIM cards or restart your phone. Note: if you enabled a SIM PIN and forgot to PIN number, you will have limited attempts to enter the PIN number.
These instructions only apply to Standard mode and the default Home screen layout. If unavailable, ensure a SIM card is properly inserted. The default SIM PIN is 1111.
Default PIN means the four digit pin code issued to you upon registration to be used once for the purpose of activating your Account and which for security purpose you must change to a PIN immediately thereafter.
The SIM card on your mobile phone will become locked if you enter an incorrect personal identification number (PIN) three times. You won't be able to use your phone, except for emergency calls. To unlock it you must reset your PIN by entering your SIM card's unique unlock key (also called a PIN unblocking key or PUK).
However, the big downside of a SIM PIN is that smartphones don't remember it and prompt you each time they reboot (there's no technical reason preventing this, the phone can remember the SIM's ICCID + PIN and automatically unlock it each time it boots if the ICCID matches the registered card's one), so now think about ...
The PIN is a 4-digit number that is saved directly to your SIM card, so it follows the SIM even if you switch it into a new phone or another device. You can lock a phone with a passcode, but if you don't have a SIM PIN you can't protect your SIM if it is stolen.
Lock your SIM card with a PIN (personal identification number) so an identification code is required to make phone calls and use mobile data. To stop other people using your SIM card to make phone calls or use mobile data, you can use a SIM PIN.
(upper-right). The default SIM PIN is 1111.
Many network service providers offer Port Freeze or Number Lock to protect your mobile number from unauthorized transfer. Once activated, you can't port your number to another line or carrier unless you remove the lock, either with a PIN or by walking into the store.
First, go to Settings in your Android device's main menu. In the Settings menu, choose Security, then Set up SIM card lock. First, here's how to disable the SIM card PIN. All you have to do is to uncheck the box next to “Lock SIM card” and then confirm the change by inputting the current PIN code.
If it started recently, then it is most likely due to a recently installed app or an app update. For a start, delete app cache from settings storage, reboot to recovery and wipe system cache.
Even if you use Face Unlock or Fingerprint Unlock, your phone will ask you to enter a PIN code, as a backup unlock option. And every time the device restarts, you will be prompted by a message which says “pin required after phone restarts”. That's by design, and is a security measure placed by Google.
What is the default PIN? The default PIN is set to 0000.
What is my SIM card PIN? The PIN code for your Three SIM card is printed on the delivery slip that comes with your SIM card. Note that you get three tries to enter the PIN, and your phone will be locked if you fail after these tries. If your phone gets locked, you'll then need to contact 3 to get a PUK code.
What's a PUK code? Your PUK (Personal Unlocking Key) is an 8-digit code unique to your SIM card. If you don't know your SIM PIN, you can use your PUK code to unlock your mobile and reset your SIM PIN.
Usually, you'll have to enter the phone number or SIM card number. After that, you may get a message with further instructions. And some SIM's take up to 24 hours to activate, though this is rare. Typically, to activate your SIM card you just need to insert the correct sized SIM into your phone.
A SIM PIN is a 4-digit code that stops people from using your SIM card when it's switched off or taken out of your phone. If you set up a SIM PIN, you'll be asked to enter the PIN when you turn on or restart your phone. If you're an iPhone user, you'll be asked to enter your PIN when you restore your phone.