With all the passwords and personal identification numbers that we use for everything from our computers to our bank accounts, it's easy to forget one now and then. PIN numbers are also used for cell phones to lock the phone. This lock keeps your private information secure and makes your phone useless to anyone who steals it or finds it if you misplace it. If you lose your PIN, there are ways to find out what it is.
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Enter the last four digits of your phone number on your cell phone PIN screen. When setting up a cell phone PIN, the default number often assigned is the last four digits of your cell phone number for most cell phones.
Enter 9999, and if that doesn’t work try 1111. The number sequence 9999 and 1111 are other standard numbers assigned when choosing a cell phone PIN.
Shut off your cell phone, take off the back of your phone and pull out the battery. Record the International mobile equipment identifier, IMEI, number under the battery. Reinsert the battery and power on the phone. Enter the last four digits of the IMEI number on the PIN entry screen. The last four digits on your IMEI number may occasionally be the service provider's preset PIN for the cell phone.
Call your service provider and request the PIN. You will have to prove you are a customer by stating your cell phone number, address and other personal information used for security.