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The company logo of Sony Corporation is seen at its headquarters in Tokyo, March 3, 2016. REUTERS/Thomas Peter

Sony is silently working on two new Xperia smartphones. These two unnamed devices, tied to the model numbers “F3216” and “F3311,” were spotted at a benchmark testing site.

Going by the GFXBench listing, the Sony F3216 will apparently carry a pocket-friendly 4.6-inch display, packed with 1080p screen resolution. This device is believed to be the Sony Xperia C6, which is nothing but the successor of Xperia C5 Ultra, according to GSM Arena.

Under the hood, this handset will reportedly come powered by a MediaTek MT6755 Helio P10 SoC, working in tandem with an octa-core Cortex-A53 CPU, running at 1.9 GHz. The graphics side of things will be taken care by Mali-T860 GPU and the device will be backed by 2 GB of RAM configuration. On the software front, Android 6.0 Marshmallow OS will run the device out of the box.

When it comes to camera specification, a 21-megapixel rear-facing sensor with LED flash will be mounted at the back of the phone. In addition, there is a very-generous 16-megapixel front-facing snapper for selfies. This device will come equipped with 16 GB of native storage space.

Moving on to the second device, the Sony F3311 will reportedly carry the same 4.6-inch display. However, the screen resolution has been reduced to 720p.

Camera-wise, a 13-megapixel sensor will be mounted at the rear, in addition to a 5-megapixel front-facing snapper. As per the listing, this device will come powered by MediaTek's MT6735 chipset, with a quad-core Cortex-A53 processor, running at 1.3 GHz. Without any surprise, Android 6.0 Marshmallow will be running the handset, backed by 1.5 GB of RAM.

Speaking of internal storage capacity, this device will come equipped with the capacity to accommodate data worth 16GB. However, there is no word available on the expandable storage option.