I spend half my time in Edinbugh and half my time in London. I bought
an iPhone & unlocked it.

I decided to go for an O2 deal because for £7.50 you can get
'unlimited' data. I have had the service for 2 days. It is dire.

I hardly ever get an 'E' icon (which indicates I am using Edge).
Also, Edge is
*painfully* slow (which I expected) I would prefer to just use turn
off Edge and only use WiFI (which is possible by chaging the settings
from the main menu)

Am I entited to take the Sim card back? I don't care about paying 1
months service (it's not much).

cheers, Mike