telecommunications service provider in Windsor, England

iCS is an independent supplier of business telecoms data and energy to UK businesses and schools. We have more than two decades' experience.

Hi. We’re O2. We know your phone's not just a phone. It's an extension of you. Which is why we're more than just a network. We've got more for you.

Better Connected

Discover options for business phone systems such as VoIP or PBX. Find and compare business phone systems, pricing and features.

O2 is a leading provider of mobile phones, mobile broadband and sim only deals. Explore My O2, Priority, O2 Refresh, O2 WiFi and much more at O2.co.uk.