Internet Settings
Go to Start>Settings>Control Tab
Click Connections
Under MY ISP click ADD A NEW MODEM CONNECTION
Name the Connection "O2 ISP" and the modem type should be CELLULAR LINE (GPRS). Click Next
The APN (access point name) is mobile.o2.co.uk
Click Next
The Username is o2web
and Password is password, all lower case. Leave the Domain blank. Click Finish.

So click ok and close everything until you are back at the TODAY SCREEN (ie. your desktop)

WAP & MMS Settings

Go to Start>Settings>Connections tab
Select connections Icon
Select Advanced
Select "Select Networks"
Under "Programs that automatically connect to a private network should connect using;"
Select New
Name for connection = O2 Active MMS
Select a modem = Cellular Line (GPRS)
Access Point Name = wap.o2.co.uk
user name = o2wap
password = password
leave domain blank and select finish

Go back to main screen

Select start>Messaging
Select Menu>Tools>Options
Select MMS

Select Servers Tab
Select New
Server Name = O2 active MMS
Gateway = 193.113.200.195
Port Number = 8080
Server Address = http://mmsc.mms.o2.co.uk:8002
Connect Via (choose the O2 Active MMS option)
Sending size limitation (personal choice between 30k, 100k and 300k)
WAP version = 2.0