What is the default PIN for my giffgaff SIM?
The PIN code (Personal Identification Number) can be enabled to prevent unauthorised access to your giffgaff SIM.
The default PIN at point of manufacture for your giffgaff mobile SIM is 5555.
When enabled, your PIN code is requested when you switch your mobile on or when you insert your SIM into a compatible mobile. You have three attempts to enter the PIN code into your mobile correctly before the mobile requests a PUK code to reset it.