The PUK code (PUK1) is an 8-digit code that cannot be changed by the user. It is only reset when the SIM card is replaced. If your mobile phone PIN becomes locked and you're prompted to enter the PUK code, it's important not to act hastily. The PUK code has only 10 attempts; if you enter it incorrectly 10 times, the SIM card will be permanently locked and rendered unusable. Some SIM cards come with the PUK code included when purchased, such as China Mobile's Shenzhouxing, while others require you to contact your service provider for it. If your PIN is locked and you don't have the PUK code, avoid randomly guessing it. Instead, call your operator's customer service number. After a quick verification of your account details, you can obtain the PUK code at no cost and unlock your device.
Sometimes, things don’t go as expected. I accidentally locked my SIM card permanently. When I contacted the mobile service provider, they told me the card had to be replaced. However, when I tried inserting the same SIM into another phone, it worked fine. Yet, it didn’t work on some other devices, which was very confusing. This contradicted what the company said, and I suspect there may be technical issues or hidden tricks involved. While many might not believe this, it’s true. Without trying, you’ll never know.
**How to Check the Password and Use the PIN Code**
Occasionally, users set a PIN code but forget it. After three incorrect attempts, the phone gets locked and requires the PUK code to unlock it.
**Method One: Visit the Service Center**
1. Bring a valid ID and other necessary documents to the local Unicom service center where the SIM card was issued. You can also call customer service to check the PUK code directly, although in practice, Unicom's customer service may not provide it. I tried calling myself and found that it wasn’t possible. However, you can reach out to your account manager or ask someone you know to visit the branch on your behalf.
2. The process usually requires you to go in person, but if you’re out of town and can’t return immediately, you can call China Unicom’s customer service and ask if your number has an account manager. If so, contact them and explain your situation — they may be able to assist you in retrieving the PUK code.
**Method Two: Check via Unicom’s Official Website (Recommended!)**
To check the PUK and PIN codes, visit the official website. Go to “China Mobile Online Business Hall†through a search engine like Baidu. Log in using your service password or SMS verification. Once logged in, use the search bar to look up "PUK" or "PIN." Click on the first result and confirm that your PUK and PIN codes are displayed.
[Image: How to check the password?]
[Image: Login page]
[Image: Search options]
[Image: PUK and PIN display]
This method is efficient and secure, allowing you to retrieve your codes without visiting a physical location. Always make sure to keep your PUK code safe, as losing it could lead to permanent SIM lockout.
TPU Cutting Machine Accessories
Cutting Head Parts suitable for Screen Protector Cutting Machine.
The Cutting Blade can be used to cut Hydrogel Screen Protector, Back Film, Watch Screen Protector, etc. The quality of the Accessories For Cutter is higher than that of stainless steel, sharp and durable, and can be cut for a long time. In addition, the blade is protected by a plastic cover to avoid scratching your fingers.
Cutting Blade Parts For Screen Protector Cutter,Cutting Tip For Screen Protector Cutting Machine,Mobile Phone Screen Protection Cardboard Scraper Tool,Scraper For Film Cutting Machine
Shenzhen TUOLI Electronic Technology Co., Ltd. , https://www.tlhydrogelprotector.com