Nokia 3120 - MMS/GPRS settings

I'm with vodafone prepay, my old 3120 handset was able to access very basic internet = a few sites: facebook/rte etc

got a brand new handset which is unlocked but was originally T-mobile UK - I'm finding that I can't connect to the internet and striggling to see where I can find the settings

the vodafone website doesn't have any obvious suggestions but I'll prob try the forum there too

anyway the different options under settings currently include

Data bearer: GSM or GPRS
Bearer settings: GPRS connection: when needed
GPRS access point: general.t-mobile.uk
IP address: 123.456.7789
Authentication type: normal
Login type: automatic
user name: user
password:
Active service settings: Tmobile GPRS (selected) or T mobile CSD or Set 3 - 4- 5- etc


is there any way I can change to vodafone settings (what are they?) or do I have to contact vodafone?