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The Microsoft logo is seen at their offices in Bucharest March 20, 2013. Reuters/Bogdan Cristel

Microsoft recently released a slew of killer devices. This includes the flagship Lumia 950, the jumbo sibling Lumia 950 XL and the mid-ranger Lumia 550.

All these handsets come with Windows 10 Mobile preinstalled. Meanwhile, old Lumia handset users are eagerly waiting to see if their handsets will receive the latest firmware update. A new leak from Poland shows a bunch of “Microsoft Lumia” and “Nokia Lumia” branded devices set to receive the firmware update.

According to earlier rumors, the Windows 10 Mobile update for the Lumia handsets that run on Windows Phone 8.1 will be rolled out in December. The new leak from WP World says the network carrier “Orange Poland” has listed several Lumia devices that are about to receive the latest update. The handsets under its ambit will apparently be updated to the new software in two phases.

The first phase of the firmware update will reportedly begin Dec. 14. This bunch will include the following smartphones: Lumia 830, Lumia 735, Lumia 630, Lumia 635 and Lumia 640.

The second update will start on Feb. 1, 2016. Here are the devices set to receive the software update as part of the second phase: Lumia 520, Lumia 532, Lumia 625, Lumia 720, Lumia 820, Lumia 920, Lumia 925, Lumia 930, Lumia 1020 and Lumia 1320.

Readers might have noticed the well-received Lumia 1520 isn’t part of the list. There’s nothing to worry as this particular scenario is specific to Poland.

Apparently, the Lumia 1520 was released as an “unlocked model” in Poland. Hence, Orange Poland isn’t responsible for updating the device, according to GSM Arena. It’s safe to assume the high-end Lumia 1520 will eventually receive the Windows 10 Mobile update.

In any case, readers should note the list above isn’t comprehensive. This means many Lumia devices might be added at any time.

Moreover, Microsoft doesn’t release all the Lumia devices across the globe. Some devices are region-specific and this list pertains to Poland. Therefore, old Lumia devices not part of the list might also be updated to Windows 10 Mobile at some point. Lastly, readers should note Microsoft hasn’t confirmed the Lumia device list thus far.

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