The dominant part of Lumia phones will be upgraded to Windows 10 - Microsoft
Keep in mind how Microsoft said that "all Lumia Windows Phone 8 devices" would be updated to Windows 10? Presently, after the Redmond goliath showcased a large portion of the new gimmicks that Windows 10 is bringing, the organization isn't so certain any longer that all models would get the update.
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As indicated by a post from the authority Lumia Conversations blog, which give a meeting Chris Weber, Corporate Vice President of Sales for Microsoft Mobile Devices, the "objective is for most of the Lumia telephones running Windows Phone 8 and 8.1 to join the Windows [10] biological community." That implies a few devices could be forgotten. Truth be told, this quote - "not every telephone will overhaul or help all conceivable Windows 10 peculiarities" - is really simple.
While Microsoft specifies a percentage of the late Lumias that will absolutely get the Windows 10 update (like the Nokia Lumia 930, Nokia Lumia 735, or Microsoft Lumia 435), things aren't that reasonable with regards to devices discharged several years back, in the same way as the Lumia 620 or Lumia 520. Assuredly, we'll soon have a comprehensive rundown of WP handsets that are Windows 10-prepared.
Notwithstanding the way that Microsoft says "there's never been a superior time than now to purchase a Lumia", its presumably better to hold up until more current models are dispatched - including an eagerly awaited leader that will run Windows 10 out of the container, and is required to land when late summer.