giffgaff PIN Code Guide

If your phone has just asked you to enter a SIM PIN and you have never changed it, the answer is 5555. This is the default PIN that giffgaff sets on every SIM card.

We strongly recommend that you change it to something only you know for better security.

A PIN (Personal Identification Number) is a 4-digit numerical password that protects your SIM card from unauthorised use. Each time your phone is switched on, you will be prompted to enter the PIN before the SIM can connect to the network.

The PIN is tied to the SIM card, not to your phone. If you swap your SIM into a different device, the same PIN will still be required.

Both the PIN and the PUK codes are supplied by giffgaff, but only the PIN can be changed. The PUK is fixed and used only when your SIM gets blocked after three wrong PIN attempts.

• Protection if your phone is lost or stolen: Nobody can use your giffgaff SIM without the PIN.
• Stops unauthorised calls or data use: Especially useful if you suspect your SIM has been handled by someone else.
• Prevents sudden bill surprises: If you are on an airtime-credit basis, no one can eat through your balance.
• Keeps your personal data safer: Texts, voicemail and call history remain protected behind the PIN lock.

Pick something memorable but not obvious: avoid sequences like 0000, 1234 or 1111, and steer clear of birthdays or phone number endings.

After three consecutive wrong PIN attempts, your SIM will be blocked as a security measure. When this happens, you will need your PUK code (Personal Unlocking Key) to unblock it.

The PUK is an 8-digit code supplied by giffgaff. You can retrieve yours by logging in to your giffgaff account at giffgaff.com/support/puk.

PIN2 and PUK2 are secondary codes used to protect specific advanced functions on your SIM, such as call-barring restrictions or fixed dialling numbers. Most giffgaff members will never need them.

Default PIN: 5555. Default PIN2: 6666. PUK and PUK2 must be requested from giffgaff.

If you accidentally enter PIN2 wrongly three times, you will be asked for a PUK2 code, which must be requested from giffgaff's network support team and can take up to 5 working days.