Enable your Roaming on the Phone NOW!! whilst in the UK and leave it enabled and make at least one
call or send one text.This will Guarantee that the system knows you were in the UK when the Roaming
was enabled and check it in your GiffGaff Dashboard.
and look for this
Roaming status ON
(EU and selected destinations)
Ignore the extra cost warnings as they are redundant but be careful once abroad if you are
near a border with a none EU country like when in France close to the Swiss Border/Cyprus(Greek-
Turkish parts)/Northern Ireland/Eire as the Network can flick over and charge from,"Airtime Credit".
Also be careful if you are on a Ferry as they have their own Networks that will be expensive and
override the "Roaming" so I'd disable the Data connection and try not to use the phone.
It's been noted that the default O2 APN settings may not work in the EU but these do,
Connection Name: giffgaff
APN - Access Point Name: giffgaff.com
Login - Username: "giffgaff" for all devices or "vertigo" for iPhones and iPads
Password: the password is "password"
Proxy: leave blank
MMS proxy: 184.108.40.206
MMS port: 8080
But don't forget to save them and then reboot the phone.
When you get off the Aircraft or Ferry Reboot the phone.This will help it pick the best EU provider
and do the same when you get back.
Have a read here as well just in case,