Editing Personal identification number (section)

==Mobile phone passcodes==
A mobile phone may be PIN protected. If enabled, the PIN (also called a passcode) for [[GSM]] mobile phones can be between four and eight digits<ref>082251615790 [http://www.etsi.org/deliver/etsi_gts/02/0217/03.02.00_60/gsmts_0217sv030200p.pdf GSM 02.17 Subscriber Identity Modules, Functional Characteristics, version 3.2.0, February 1992], clause 3.1.3</ref> and is recorded in the [[SIM card]]. If such a PIN is entered incorrectly three times, the SIM card is blocked until a [[personal unblocking code]] (PUC or PUK), provided by the service operator, is entered.<ref>{{Cite web |title=What is a PUK code? |url=https://support.bell.ca/mobility/smartphones_and_mobile_internet/what_is_a_puk_code |access-date=2024-07-15 |website=support.bell.ca}}</ref> If the PUC is entered incorrectly ten times, the SIM card is permanently blocked, requiring a new SIM card from the mobile carrier service.

Note that this should not be confused with software-based passcodes that are often used on smartphones with [[Lock screen|lock screens]]: these are not related to the device's cellular SIM card, PIN and PUC.