I have an iPhone 3GS.
Software version: 4.0.2
Pay as you go on Vodafone.
Carrier: Vodafone UK 7.1

The problem is that I cannot connect to the internet when im out and about.
Theres no problem conncting to my home WiFi... But as soon as i go out i cannot access facebook, email, iTunes store.....etc.
ALSO i CANT receive MMS :S (how do i fix this? where can i d/w the settings?)
I HAVE credit, £7, So that cant be the problem..
According to the vodafone website my carrier settings are up to date... but then it says that THEIR current provided carrier settings is 5.1. It's too confusing.

ok:
Ive got no clue where to download the settings for internet and MMS.. after hours of searching.
Can anybody help me?

Any help is GREATLY APPRECIATED, and Thank you in advance.