To send and receive MMS messages you will need to install the giffgaff APN profile (usually by texting the word settings to 2020) If this doesn't work and you still can't send MMS messages you will need to enter the following data into the appropriate fields. This is generally found under network/messaging settings on your phone.
Connection Name: giffgaff - MMS
APN - Access Point Name: giffgaff.com
MMS proxy: 22.214.171.124
MMS port: 8080
APN type: mms
Hope this helps, if you need any more help head over to http://community.giffgaff.com/t5/Help-Ask-the-community-got-stuck/How-do-I-update-my-giffgaff-settings-on-a-new-handset/ta-p/3489121 or just message me.
Remember to give plenty of kudos to the people who helped you 🙂
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