Windows Phone 8.1 OTA ready for May release, Developer Preview expected next week

Windows Phone 8.1 will get its long awaited release in May with Microsoft gearing up for a busy few months when it comes to its Nokia Lumia line of smartphones.

Related: Nokia Lumia 630 specs leaked ahead of rumoured Build 2014 launch

The new version of its phone OS will be released to members of its Developer Preview programme on 8 April just after Microsoft’s Build Developer Conference 2014 that runs from 2-4 April.

Sources quoted by IBTimes added that the full Windows Phone 8.1 over-the-air roll out for devices that currently run Windows 8 will start at some point in early May with Microsoft yet to firm up a solid release date for the OS.

Microsoft will use Build 2014 to release the first device to run on Windows Phone 8.1 in the shape of the Lumia 630 dual-SIM card device with the rumoured high-end Lumia 930 now not thought to be appearing at Build 2014.

The Lumia 630, which was codenamed Moneypenny before getting a Lumia number, comes in at the lower end of the Windows Phone market and images of the phone have so far shown it to come in a variety of colourful options with a basic camera that has no flash or camera key.

It’s likely to have a 4.5in 854 x 480 resolution screen, a Qualcomm Snapdragon 400 quad-core processor, 1GB of RAM, GSM and WCDMA network support, and the aforementioned dual-SIM slot.

In comparison the high-end Lumia 930, which could see the light of day shortly after Build 2014, is rumoured to have a 5.2in display with a Full HD 1080p resolution and a Qualcomm Snapdragon 800 quad-core chip clocked at 2.3GHz supplemented by an Adreno 330 GPU. If that wasn’t enough it’s also expected to have a powerful 20-megapixel camera.

Related: Nokia Lumia 630’s colourful backside gives way to disappointing camera

Build 2014 should see a number of new Windows Phone 8.1 apps launched alongside the OS and smartphone, with the annual get-together likely to give us a good idea about Microsoft’s strategy for the coming months.