Sony xperia-m4-aqua
Sony has confirmed that the Xperia M4 Aqua will directly be updated to the Marshmallow OS version from Android 5.0. Sony

Sony’s wallet-friendly Xperia M4 Aqua, released in June, is now official in the U.S. It is worth noting that Amazon has been selling the 8 GB model of this handset “without U.S. warranty” for a couple of months now. However, the official U.S. variant "with warranty in tow" comes with 16 GB native storage in Amazon.

Speaking of price, the Sony Xperia M4 Aqua will set the buyers back by as low as $199.99, without a contract. The original price of the handset, according to Amazon, is $299.99. This means, buyers get 33 percent discount on a brand new device.

In general, the Xperia M series of devices comes packed with mid-range configurations for an entry-level price tag. The icing on the cake however is the IP 68 certification, similar to high-end Sony Xperia Z lineup.

Spec-wise, the Xperia M4 Aqua features a 5.0-inch IPS LCD display, packed with 720 x 1,280 pixels screen resolution. Under the hood, the handset comes powered by an octa-core (Qualcomm Snapdragon 615) SoC and backed by 2 GB of RAM. The phone runs on Android 5.0 Lollipop OS. However, it’s upgradable to Android 6.0 Marshmallow.

When it comes to camera configuration, there is a 13-megapixel rear-facing sensor with LED flash, in addition to a 5-megapixel front-facing shooter for selfies. The 16 GB internal storage can be expanded for up to 128 GB by using a microSD card.

The Xperia M4 Aqua houses a modest Li-Ion 2,400 mAh non-removable battery unit. This cell is reportedly capable of providing up to 13 hours and 20 minutes of 3G talk time and up to 685 hours of 3G stand-by time, GSM Arena reported. Lastly, this model supports U.S. LTE bands and it is compatible with AT&T and T-Mobile.

Here is the official Tweet confirming the availability of the device: