While the release date for Windows 10 is approaching, Microsoft has not yet clearly stated which devices can be upgraded to Windows 10 Mobile and which will remain in Windows Phone 8.1.
There are some smartphones Lumia which the company has confirmed to be compatible with Windows 10 Mobile.
Some have also been announced by manufacturers (OEMs), but Microsoft has not yet announced the minimum upgrade requirements.
But the by clicking here WindowsMania.pl has reportedly obtained a Qualcomm list showing the compatible ones phones with the upcoming Windows 10 Mobile.
According to the table, if the Lumia smartphone is equipped with one of the listed Qualcomm chipsets, then it is eligible to upgrade to Windows 10 Mobile.
See the list of chips supporting the upgrade