The Lumia 800, Nokia's first Windows Phone device, is available to buy in the UK today from £399 on pay-as-you-go.
The handset is available today on the Three or Vodafone network. It will be available on Orange from Thursday, an Orange spokeswoman confirmed. T-Mobile said it will offer the device, but could not confirm when it would go on sale.
Three is offering the Windows Phone Mango handset for free on £30 per month contracts with a two-year duration. This includes 500 minutes, 5000 texts and 1GB of data usage. Increasing the monthly commitment to £37 per month brings an unlimited data allowance, 5000 texts and 2000 talktime minutes.
O2 is the only major network operator that is yet to confirm that it will be stocking the device, but a company spokesperson told ZDNet UK that it is still in negotiations with Nokia.
"O2 has been a long standing supporter of Microsoft's Windows Mobile strategy and we range several handsets featuring the Windows Phone OS," an O2 spokesman said. "We are supportive of Nokia's strategy in this area and continue to work closely with them and will update in due course."
Paul Amsellem, the new head of Nokia France, also confirmed to French newspaper Les Echos on Tuesday that the company would also be launching a Windows 8-based tablet in June 2012.