Activate sim

[jp_fondu]

I've lost the 6 digit code and it days I can use the 16 dogit code on the SIM card. But where??
I've tried in the place where you put the 6 digit code.

[sloz ace of spades · Accepted solution]

It's the first 19 digits on the back of the sim

[nayir_123 veteran]

If you have lost the activation code (which is located on the credit card-sized plastic which originally held the SIM card) you can insert the SIM Serial Number instead - this is the 19 digits printed on your SIM card (right before 3Ggg1*).

You need to enter it correctly here:
https://giffgaff.com/activate

[joejoe2020 navigator]

try using the 19 digit code on the back of your sim go here to enter it  https://giffgaff.com/activate