MMSC: mmsc.mms.o2.co.uk:8002
Proxy: 193.113.200.195:8080
APN: wap.o2.co.uk
USERNAME: o2wap
PASSWORD: password
I am on 02 and it works fine, you may need to call 02 and ask them to activate mms if your on a iphone contract, they might say that the iphone cant use mms but just say you sometimes use a phone with mms and they will then activate it!