Thanks to our friends over at PhoneArena, we’ve caught wind of a Chinese Sony rumor site‘s forum post we’ve been able to discover some rumors about Sony’s planned flagship phones for 2013. These phones will all feature Qualcomm’s latest S4 class SoCs, which is no surprise considering that all of Sony’s current phones do as well.

The rumored phones are the Sony Xperia 4, Sony Xperia 5R, and Sony Xperia 6 and one unnamed phone. The first of the three phones will be a 4" phone with a 720P resolution and 360 PPI (higher than the iPhone). Additionally, this phone will have a 12MP camera and a Qualcomm MSM8960T dualcore processor. This processor is the upgraded version of the MSM8960 as it has an improved GPU which is upgraded from an Adreno 225 GPU up to an Adreno 320 which is primarily designed for 1080P resolutions. As such, the GPU will perform exceptionally well, similarly to what you can expect on an LG Optimus G or Nexus 4 (when not thermally throttled). Sony has also opted to go with 1.5GB of RAM, 16GB of internal memory, and 1.5GB of RAM as well as a MicroSD card slot. This appears to be a pretty impressive 4" phone to compete against the likes of the Nexus 4 and Optimus G. This will all be powered by a standard sized 2,800 mAh battery.

The second of the phones, the Xperia 5R, should feature a 1080P display with a 13 MP camera and Qualcomm’s APQ8064 quadcore processor. The rumor also states that it will feature LTE, which likely means that this phone will also have a Qualcomm MDM9615. It could, however, feature the newer 3rd Generation LTE MDM9x25 which supports LTE.A or LTE Advanced and also supports LTE Cat 4, which enables downlink speeds of up to 150 mbps. The phone is also rumored to sport 2GB of RAM, 32GB of internal storage and a MicroSD card slot. This phone will be powered by a sizable 2,800 mAh battery.

The third monster of the four phones will be the Xperia 6, which will feature many of the same specs as the Xperia 5R but with a 6-inch screen. It will, however, feature 3GB of RAM and a 3,500 mAh battery which is unheard of. The largest battery we’ve seen so far in any smartphone has been a 3,300 mAh battery in the Motorola RAZR Maxx which we’ve been reviewing.

The final phone that was rumored to be the most powerful and the furthest off 4Q 2013, is intended to be Sony’s late-year flagship phone and is listed as a quad-core A15 chip. The rumor states that it is neither a Qualcomm nor Nvidia chip, which would leave it to either be an STMicro possibility or perhaps an in-house design. We believe it could still be a Tegra 4 chip, however. It is rumored to feature 3GB of RAM, a 16MP camera, 3,000 mAh battery and have a similar 1080P resolution.

Needless to say, phones are continuing to get bigger and more powerful, with almost no end in sight. With Sony quietly creeping into the #2 Android smartphone manufacturer slot, they’re definitely preparing themselves to continue to hold that spot for the coming year, if not try to challenge Samsung.