Giffgaff and iPhone

For a long time now I have used Giffgaff as my mobile phone network provider. They offer good value and run on the O2 network in the UK.
The only problem I have is that Apple does not recognise them and I have to manually enter MMS and data settings. Also I cannot take advantage of the personal hotspot feature as this is set to O2 and cannot be changed.
I hope iOS 7 addresses these issues.