Recently, we passed along some speculation that the Nokia Lumia 630 , and the Nokia Lumia 930, would both be unveiled at the BUILD conference on April 2nd . Since that rumor started making the rounds, we have seen many leaks related to the Lumia 630, including a video of the phone running Windows Phone 8.1 . At the same time, there has been nothing about the Nokia Lumia 930.The lack of any leaks involving the Nokia Lumia 930 could be due to a new rumor, which states that the Lumia 930 will not join the Lumia 630 at the BUILD conference after all. According to the rumor, the low-end Nokia Lumia 630 will appear at the event along with some new apps from Nokia. Both Lumia models are still expected to be released in April.According to the same rumor, the delayed Windows Phone 8.1 developer preview, which was expected to be unveiled at BUILD, will be delayed until April 8th instead. And Microsoft is now expected to push out the Windows Phone 8.1 update OTA to Lumia owners, starting in early May. Windows Phone users who have been waiting for their own virtual voice-activated assistant , can hardly wait.source: NPU via WMPoweruser