Microsoft Lumia 640 XL
Microsoft Lumia 640 XLIBTimes India/Raymond Ronamai

Microsoft was supposed to start rolling out Windows 10 Mobile update to all the eligible devices in December, 2015, but Lumia handsets are yet to receive it even in February. After several rumoured reports of the software being seeded to a couple of devices, the list of OEMs that are said to be testing the operating system has been leaked.

AdDuplex, a cross-promotion network for Windows Store apps and games, has given out the list of OEMs that have Windows 10 Mobile handsets, according to a report by WMPowerUser. Devices in list include HP Elite X3, HP Falcon, Lava Win1, Xolo WinQ1000, Qualcomm MTP8996 and Qualcomm MTP8909.

The software giant may have revealed OEMs that will test Windows 10 Mobile handsets, but the software update to these devices may come late, and it won't come as a surprise if some get it by the end of the year. The fact is that Microsoft hasn't rolled out the software to any of its devices so far, despite the Lumia 950, Lumia 950XL and Lumia 550 coming with the OS pre-installed.

[Read: Microsoft Lumia 535 gets Windows 10 update]

Meanwhile, Microsoft Lumia Mexico has revealed Windows 10 Mobile update schedule for Lumia devices on its Facebook page. It has claimed that the company will start rolling out the software to some devices on 29 February, but we are yet to hear from Microsoft. 

[Read: Windows 10 Mobile update rolled out to Microsoft Lumia 640]

It was earlier reported that the software had been seeded to the Lumia 535 in Latin America and T-Mobile variant of Lumia 640 in Poland before another speculation started doing the rounds that the Lumia 535 in Egypt and Jordan has received it. However, none of these devices have got the new OS till date.

Microsoft has confirmed that Windows 10 Mobile update will be rolled out to Lumia 430, Lumia 532, Lumia 535, Lumia 540, Lumia 640, Lumia 640 XL, Lumia 735, Lumia 830 and Lumia 930 initially, before reaching out to all Windows 8.0-based phones.