Just came from a 9900 to a 4, i can not get a unlimited internet tarriff (which i really need) because o2 has stopped them. But my blackberry bolt on has unlimited which takes £5 off my top up for it.

Ive had my iphone for 3 days now and the internet/apps have been working fine, will this continue to work after top up or will it stop once this month has run out?