Hi there and thanks for visiting the community. If you have access to wifi,there is the giffgaff APN app available in your 'google play store 'that should fix your "settings" for you .If you would like to go to your google play store and get the giffgaff APN app,simply click onto either of the links below. https://play.google.com/store/apps/details?id=com.giffgaffmobile.controller
Press the menu key,then SAVE apn. Tick the apn to see the green light,you now should be set up for internet and mms.Ensure your data is enabled or use packet data.Then turn your device OFF and On again. Please remember that mms are 16p each to send and are NOT free or part of ANY goodybag allowances.If your device software is running on jellybean,please click onto the link below,to take a look at a great guide,thanks again.