A Spanish Windows phone related website WindowsPhoneApps.es reported that Microsoft Lumia 640 and 640 XL receives new firmware update in Latin America.
The latest update changes the firmware from 02177.00000.15184.36002 to 02177.00000.16025.27003.
There is no changes after installing latest update , but we hope that this will be a preparation for Windows 10 Mobile update on Lumia 640 and 640 XL.
We have no other sources about the update, so we are not sure about this news.