hi are you currently in the UK or abroad?
Can you connect to all Web pages or just giffgaff pages?
At the top of the phone do you see
giffgaff or O2-UK logo
(3G, 4G, H, E, gprs)
From your phone keypad dial
Star 100 star 7 hash
And press call
Do the same with *100#
What word or words do you see on the phone screen?
Can you call 443 and 1 1 1 ?
What do you hear exactly when you call your number from another phone?