Joining T-Mobile Poland and Netherlands, French carrier Bouygues Telecom has just released some more information about the coming Windows 10 Mobile upgrade to WP8.1 handsets.

Speaking on Twitter their support said the Windows 10 Mobile upgrade will start next week.

@NotCassim Hello! Les MAJ des Windows Phone 8.1 vers Windows 10 devraient commencer la semaine prochaine. Cela concerne les modèles 1/* — Bouygues Telecom (@bouyguestelecom) January 14, 2016

Their support also confirmed which handsets will be getting the upgrade,giving the following list:

@NotCassim -Lumia 635 -Lumia 640 -Lumia 640XL -Lumia 730 -Lumia 735 -Lumia 830 -Lumia 930 -Lumia 1520 -Lumia 532/535/540/636/638 2/2 — Bouygues Telecom (@bouyguestelecom) January 14, 2016

The list notably includes the Lumia 635, when Vodafone Australia has excluded the Lumia 630 from their current upgrade list. It appears likely the update will be OS version 10586.63.

Has the update reached the handsets of any of our readers yet? Let us know below.