Great news here for Lumia 640 owners on AT&T and Lumia 735 owners on Verizon. The official Windows 10 Mobile update is now rolling out to owners of these devices in USA. This was confirmed by none other than the new Windows Insiders program chief “Dona Sarkar”.
— Dona Sarkar @ #MSIgnite (@donasarkar) June 3, 2016
You can click here to read how to prepare your devices for Windows 10 Mobile upgrade and how to update your devices to Windows 10 Mobile.
If you are facing issues in updating to Windows 10 Mobile or during the installation process or even after the update, please refer to our guide to resolve most commonly known Windows 10 Mobile upgrade, installation and usability issues. Read our other useful and interesting windows 10 Mobile tutorials by clicking here.
You can read the massive Windows 10 Mobile changelog and watch hands-on video demo of the new features by going to our Windows 10 Mobile dedicated article.