Google officially announced the arrival of Android 6.0 Marshmallow. At an event on September 29, the company announced two new Nexus line devices, the 5X and 6P, and also stated that they will arrive in stores with the new version of the system.
We know that the smartphone market is wide, not to say drowned, and that it is not easy to keep updates for so many devices available on the market. Generally, manufacturers update only the latest devices released within a maximum of two years. So if you have a 2013 device, don't count on the update.
Thinking of making your life easier, I listed here the manufacturers who have already announced the devices that will receive Android 6.0 Marshmallow.

Motorola

Motorola was one of the first to announce the update, leaving many orphaned users, as the list does not include the first generation Moto G, Moto E and Moto X. There was also the premature death of Moto And second generation.

• Moto G (2nd Generation – 2014)
• Moto G (2nd Generation 4G – 2014)
• Moto G (3rd Generation – 2015)
• Moto X (2nd Generation – 2014)
• Moto Maxx (2014) (Ufa!)
• Moto X Style (2015)
• Moto X Play (2015)

Samsung

Samsung has not yet released which devices from previous generations will receive the update, but confirmed those from the list below.

• Samsung Galaxy S6
• Samsung Galaxy S6 Duos
• Samsung Galaxy S6 edge
• Samsung Galaxy Note 4
• Samsung Galaxy Note 4 Duos
• Samsung Galaxy Note edge
• Samsung Galaxy ALPHA
• Samsung Galaxy Tab

HTC

Even though it is not widespread in Brazil, it is worth commenting on which devices the manufacturer will receive Android 6.0.

• HTC One M9
• HTC One M8
• HTC One M9+
• HTC One E9+
• HTC One E9
• HTC One ME
• HTC One E8
• HTC One M8 Eye
• HTC Butterfly 3
• HTC Desire 826
• HTC Desire 820
• HTC Desire 816

Sony

Sony, despite its efforts, always releases late and disastrous updates of its devices. The company always promises to update almost its entire business line, but it usually takes too long. Information has not yet been released from which devices will receive Android 6.0, but there is a list of the devices Sony is testing with the new system. They are:

• Xperia Z3 Plus
• Xperia Z4 Tablet / Wi-Fi
• Xperia Z3
• Xperia Z3 Compact
• Xperia Z3 Tablet Compact
• Xperia Z2, Xperia Z2 Tablet
• Xperia Z1
• Xperia Z1 Compact
• Xperia Z Ultra
• Xperia Z
• Xperia ZL
• Xperia Tablet Z

Rumors indicate that arrival can occur, later, also at Xperia E3, E4, Xperia M2, M4 Aqua, M5, Xperia C4, C5 Ultra, Xperia T2 Ultra and T3.

LG

LG has not yet released which devices will receive the update, but has already announced that the new LG V10 will come from factory with Android 6.0.

Asus

Until the closing of this article, Asus had not yet released which devices will receive the update.
[Post developing. Last updated: 03/10 às 11:41]