When it comes to Marshmallow (otherwise known as Android M or Android 6.0), it feels like a lot of Android products are getting it by now. This includes Sony, and now there is talk about Android N (otherwise known as Nougat or Android 7.0). This is what is known about Android M Version 6.0 Marshmallow and Android Nougat Release Date for Sony Xperia Z5, Z4, Z3, and Z2 on Sprint, T-Mobile, AT&T, US Cellular, and Verizon.
There hasn't really been much news as far as what is going on with Sony. So far, it would appear that Marshmallow is on all kinds of Sony phones including the Xperia Z5 series (the Xperia Z5, Xperia Z5 Compact, and Xperia Z5 Premium), the Xperia Z4 Tablet, Xperia Z3+, Xperia Z3, Xperia Z3 Compact, Xperia Z2 Tablet, and the Xperia Z2.
There are also reports of the Xperia Z3 Tablet Compact, Xperia M4 Aqua, and the Xperia M5 getting Marshmallow. There are also plans confirmed for Xperia C5 Ultra and Xperia C4, but not anything for the Xperia Z1 and Z1 Compact.
Other news about Sony includes some of their new smartphones in the United States. According to Phone Arena, Sony started selling the Xperia XA Ultra stateside, after a week after releasing the Xperia XA and Xperia X Performance. In case you didn't know, the Xperia XA Ultra comes with Android 6.0 right out of the packaging, which is compatible with AT&T and T-Mobile, as this unlocked GSM/LTE device can't be used on CDMA carriers like Verizon, Sprint, and US Cellular.
So what will be the first Sony devices to receive Android Nougat? Chances are, it will be the aforementioned Sony Xperia X devices first. Given that the newer Android devices receive the upgrade first, it will probably happen in this order: Z5-branded series (Z5 Premium, Z5 Compact, and the simple Z5), then the Z4 tablet, and the Z3 series. The Z3 series is pretty popular, so it would not be surprising if Nougat comes there. Sort of like how the Z1 series won't be getting Marshmallow, it will be unlikely that the Z2 will get Nougat.
If you are a Sony user of a newer device in the United States, see if you can't get the OTA (Over The Air) download of Android Marshmallow now. Just go into the "Settings" and "System Update" to see if the upgrade is available. The upgrade may not be available depending on your carrier like T-Mobile, Sprint, US Cellular, AT&T, and Verizon. Feel free to leave a comment here saying whether or not you received your Marshmallow on your Sony device, as well as what carrier that you subscribe to.