on 26-10-2013 12:28
When you say your phone is blocked do you mean its locked to your previouse provider? if so you will need to unlock your phone to all networks, this can be done on most high streets or markets that have a "unlocking" service. If its something else can you please give a little more detail thanks. What comes up on your screen when you put in your giffgaff sim? what phone are you using ect.
on 26-10-2013 12:30
You'll need a new PUK code if you entered your SIM PIN code incorrectly three times and locked your handset
Need a puk code click on this link. http://giffgaff.com/support/puk
Is it a second hand phone, it may be barred.
Have you been tethering. Gg may have barred you.
Raise a case with the agents and ask them
Use the link below
If you have problems, try a different browser, ie Chrome, Firefox. Or use the link below,
And choose 30 in the drop down box. And then write the specific nature of your issue in the text box provided.