How can I find my pin number from my mobile phone?

This varies a bit, depending on brand of cell phone. I gather you are referring to the pin code for the SIM card.

Changing my mobile phone PIN Samsung Galaxy S4 Optus

https://www.lg.com/us/mobile-phones/gelatoQ/1_14_3_using_a_pin_or_password_to_lock_the_screen.html

You will need to google the "change pin number for Samsung S4", for example.

Do you want get mobile network unlock pin number?What is your mobile brand name&model? If you need network unlock pin you can visit this site Theunlockspot.com here you can get the code and unlock your mobile network lock pin easily. To get the code you have to mentioned your mobile brand name,model,which country is locked now,network provider and imei number. Then they send unlock code through email.
TheUnlockSpot.com

Methods to find Blackberry mobile phone's PIN number:

1 - Go to the Menu -> Options ->Status
2 - You will then see an 8-digit Alphanumeric-ID labelled as PIN.

Or

1 - Look at the sticker located under the battery on your mobile phone.
2 - The PIN number will be labelled as PIN as shown in the picture below :




SOURCE: MobileUnlockGuide.com

You need to telephone your mobile phone service provider and ask for the PUK code. Then put in the wrong pin 3 times and the sim card will lock. Turn the phone off and back on. When it's starting up it will ask for the PUK code. Enter the code and it will ask you to create a new pin number. The new pin number can then be used to start the phone.

first ask your service provider for the PUK numbe. after getting the PUK number, go to security settings and choose change PIN, it will ask for old PIN number, try a random number and then it will show, sim blocked, please insert PUK number.
insert the PUK you got from your operator and then you will be able to change your PIN and hence remove it.

hi you can unlock your phone by typing the pin number 1234

please try it:
ur defalt phone code is 12345 or 00000 or 0000 u can use it
Default 4 Digit user code: 1234 or 0000


First type *#06# in your mobile and get IMEI number for your mobile

OR:
Please Hilp the Service Oprater

PUKs, or personal unblocking keys, are used to unblock a mobile phone which becomes blocked. Mobile phones may become blocked when a PIN (personal identification number) is entered incorrectly on three consecutive occasions. In some instances, the phone may become blocked, which requires a PUK to unblock it, and in other instances, the SIM (Subscriber Identity Module) card itself becomes blocked and again will require a PUK to unblock it.Mobile phones are also blocked when they are reported stolen and if there is an outstanding payment on the account.It is important to differentiate between unblocking phones (using a PUK) and unlocking mobile phones (using another type of code). NOTE: It is a criminal offence for anyone to attempt to unblock a mobile phone, other than the network provider who put the block on the phone.If your phone has become blocked by mistake, for example you have entered the PIN incorrectly on three consecutive occasions, then you need to contact the mobile phone network operator with your details. To explain a little more, specific to your mobile phone network, You need to go to your Service providers, web site & navigate your way to the specific PUK details for your mobile phone network operator. Usually you have to Register your phone to get a PUK code.

DO NOT DOUBLE POST

contrcat ur service provider give ur sim number and the mobile number they will give the PUK code for ur MOBILE