Talk time: Up to 19.7 hours
6.5 inch screen
Click "pick one of our pre built plans"
Click the cheapest plan
Go through checkout
Once phone is received pac your number out, or ring o2 to cancel.
If you get charged for 1 Month, you'll need to ring them back to get that refunded.
I'd advise not going ahead if you don't want a small credit check, or if you don't want the hassle, as it is sometimes a massive hassle to do one of these right effectively