Xiaomi Redmi Note 7 owners often have to enter a security code every time they turn off or restart the device. SIM-It's a card from unauthorized use in case of phone theft, but constantly entering numbers can be annoying, especially if the gadget is only used by you and rarely leaves your hands.
Disabling this request is a simple process, but requires care, since one error when entering PUK-This code can permanently block the communication module, and in this article we will discuss in detail how to deactivate the PIN check on the shell. MIUI, What are the nuances of working with different operators and what to do if the standard path in the menu is not available or hidden.
Before you start changing your settings, make sure your Redmi Note 7 is charged and has a stable network connection, although the internet is not necessary for the procedure itself. SIM-Maps: we work with the last one, which is stored on the operator's chip.
Preparing for changes in security settings
The first step before any interference with system security settings is to find the original PIN, which is usually listed on the plastic card holder you received along with the SIM card in the salon, and the standard combinations are often 0000, 1111 or 1234, but you shouldn't rely on them.
If you don't know the current code, don't try to guess it with a pumpkin. Three mistyping will lead to a lock on the card and a request. PUK-Ten failed attempts to enter PUK This will cause a complete and irreversible damage to the SIM card, and then you have to go to the salon for a new one.
⚠️ Warning: Never enter random numbers unless you are sure the code is correct. SIM-Xiaomi Redmi Note 7 cards are solved only through the operator’s personal account or a call to the support service.
Make sure that your device has the current version of the firmware installed. MIUI. Although the settings menu SIM-The cards rarely change dramatically, in older versions of the shell, the path to the desired point may differ. → The phone. → Version. MIUI.
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Write your current PIN and PUK codes to a safe place or take a photo of the plastic card holder before starting any manipulations.
Searching for the settings section SIM-card MIUI
The interface of the MIUI shell installed on the Xiaomi Redmi Note 7 may vary slightly depending on the regional version (Global, Russia, China). However, the logic of the menu layout remains the same. You need to get into the deep settings of mobile networks.
Open the main app menu and find the Settings icon (cogs). In the list that opens, scroll down to the connection and network section. In different versions, it can be called"SIM-Maps and mobile networks" or simply "Connection and sharing".
Click on this to open the additional menu. Here you will see a list of all active SIM cards installed in your smartphone. Redmi Note 7 supports two cards at once, so the settings can be duplicated for each.
It is important not to confuse this section with the password settings of the lock screen. Look specifically for the SIM or the name of your carrier. If you can't find the right item, search by settings by entering the word "SIM" or "PIN".
Step-by-step instructions for disabling the code request
Once you have found the SIM settings section, you will see a list of installed modules, select the card you want to unprotect, usually signed as "SIM 1" and "SIM 2" or have carrier names if you have previously specified them.
Inside the menu of a particular SIM card, find an item called “Protection”. SIM-maps, "Blocking" SIM" or"PIN-code SIM-The switch will be located opposite this point. If it is active (blue or green), then the code request is enabled.
☑️ Algorithm of PIN-code deactivation
Press the switch to deactivate the function. The system immediately request the current PIN to confirm the operation. Enter four (less commonly six or eight) digits correctly. If the code is correct, the switch will turn off, and the next time you restart, the phone will not ask for the code.
⚠️ Warning: When you enter the code, make sure that the screen does not include the "Show symbols" feature if there are strangers nearby.
If the switch returns to its original position after entering the correct code, the problem may be a software failure or damage to the SIM card contacts. Try to remove the tray, wipe the SIM contacts with a soft cloth and insert it back.
Work with PUK-lock-in
In a situation where you entered the PIN three times incorrectly, your Xiaomi Redmi Note 7 will block the SIM card and require you to enter the PIN. PUK-It's an eight-digit code that is used to unlock when you lose your master password.
Enter. PUK-You can use the code right in the window that appears on the lock screen, and after you've entered it, the system will prompt you to specify a new PIN, come up with a combination that is easy to remember but hard to guess, or immediately disable the request, as described in the previous section.
| Parameter | PIN code (PIN) | PUK code (PUK) |
|---|---|---|
| Appointment | Daily protection of SIM | Unlocking after PIN errors |
| Code length | 4-8 digits | 8 digits |
| Attempts to enter | 3 attempts at | 10 attempts at trying |
| Where to find out. | On the card holder. | on the card holder or the operator |
If you have exhausted all 10 attempts to enter PUK-The SIM card becomes a brick, and you can't restore it, you need to replace it with your phone number, and you need to be very careful with that data.
Where to find out. PUK-code if the card holder is lost?
Set up separate SIM cards on Redmi Note 7
Since the Xiaomi Redmi Note 7 is a dual-sim device, you can flexibly manage the protection for each card separately, which is useful if one SIM card is only used for the Internet, and the second for important calls and correspondence.
In the settings menu, you can see the protection status for SIM 1 and SIM 2 independently, for example, on the working SIM card you can leave a PIN for additional security of corporate data, and on the personal one, which is always on the phone, you can remove the request for convenience.
To switch between cards in the settings, just go back a step to the menu"SIM-Maps and mobile networks. There's a general list that shows the security status for each slot, so you can quickly change the security configuration without removing the tray.
Also in this section, you can configure which SIM card is used by default for mobile data transfer, voice calls and SMS. These settings do not affect the PIN code, but optimize the operation of the device as a whole.
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Flexible management of two SIM cards allows you to keep one protected by a PIN code, and make the second available immediately after turning on, combining security and comfort.
Solving input problems and errors
Sometimes, users are faced with a situation where the phone does not accept the correct PIN, which may be because the code was manually changed earlier, and you type the factory version, in which case you need to remember whether you have changed the code in the past.
Another reason may be the malfunction of the SIM reader in cheap adapters for Nano-SIM cards. If you cropped the card or use an adapter, try to bend the contacts carefully or replace the adapter with a new one.
- 📱 Make sure the SIM card sits tightly in the tray and doesn't dangle when shaken.
- 🔄 Reboot your smartphone before retrying to reset temporary communication module errors.
- 🔍 Check if the “Block All Inbox” function is enabled, which sometimes conflicts with network requests.
If the problem persists even after replacing the SIM card, it may be the software that helps, in rare cases, resetting network settings (not a full phone reset!) through the Settings menu → Connection and Sharing → Reset Wi-Fi, mobile networks and Bluetooth.
⚠️ Attention: Resetting network settings will remove all saved Wi-Fi passwords and associated Bluetooth devices.