Customers signing up to O2 Home Broadband will get free 24-hour support, unlimited downloads and a free connection and wireless router as part of the deal, which costs from £17.50 per month.
Prices for O2 Home Broadband delivered over O2's LLU (local loop unbundling) network, rather than BT's, start from £7.50 per month.
O2 Business Broadband offers download speeds of up to 20Mbps, though customers outside of O2's own network will be on BT lines, and will get 8Mbps speeds.
Business users can expect a free connection and wireless router, unlimited usage, five licences for McAfee security software, 24-hour customer support, on-site support, one static IP address and dual SSID.
For more broadband news and advice, see Broadband Advisor