Owners of the first generation iPhone and the newer 3G iPhone will be able to use BT OpenZone Wi-Fi hotspots to access the internet for free from 11 July.
Originally, UK iPhone operator O2 only offered BT Wi-Fi hotspot access to those who bought the new 3G iPhone handset. However, O2 has since had a change of heart and extended the deal to include those using the original iPhone.
iPhone users already have access to The Cloud's Wi-Fi hotspots, but the additional 3,000 BT OpenZone Wi-Fi hotspots across the UK mean those with Apple's smartphone can now use more than 9,000 Wi-Fi networks.
"By working with partners like BT Openzone we can maximise the web experience for iPhone customers," said Ronan Dunne, CEO of O2 UK.
"Public Wi-Fi hotspots ideally complement our mobile network, providing high-speed web browsing and unlimited access to services like the iTunes Wi-Fi store in a wide variety of convenient locations."