O2 Broadband requires a BT line and is subject to availability.
Non O2 mobile customers may also be want to check out BeThere. "BeThere" is owned by O2 and both (O2 and BeThere) use the same network infrastructure.
Please note:-
O2 entered the broadband market in October 2007.
Like other mobile operators, it is using discounted broadband to "up sell" it's mobile phone contracts.
The O2 network uses the BeThere infrastructure which has, to date, been one of our best performers for reliability and speed.