Swisscom, a carrier in Switzerland, has announced on Twitter they expect to have the Lumia 900 available for customers in May. The international version of the Windows Phone is being made available for pre-order across Europe, but a release date has yet to be announced or confirmed.
The #Lumia900 is available with us from the beginning of May.
Tech website Mobile Fun previously revealed April 9th as the date for the UK, but we remain skeptical with the likes of Clove not releasing any information. Should Swisscom's (roughly translated) statement hold true, we should look to see the Lumia 900 rolled out across Europe early May.
Source: @Swisscom_de; thanks Thomas for the tip!