Iphone 4 cellular network problem?

Ok so i bought a iphone 4 on ebay it was unlocked so it put in my BT SIM card which was under vodafone and when i try to access the web on safari it says you are not subscribed to a cellular network. The SIM card worked perfectly on my Blackberry but it won't work on the iphone.

Blackberries and iPhone use different data networks. You have to contact your carrier and ask them to give you regular data service, not Blackberry service.

You will need to find out if the Cellular Data is activated on your device first.

find out about it by going to:
Settings > General > Network >
and, make sure that "Cellular" is on.

Then, I suggest you to contact your service provider and ask them about how to set the APN settings on your device.

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