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Sony has officially unveiled two feature-rich budget smartphones, the Xperia C5 Ultra and the Xperia M5. REUTERS/YUYA SHINO

Sony has unveiled its Xperia Z3+ flagship, and now there are rumors that the Japanese tech giant will be releasing the Xperia Z5 and the Xperia Z5 Compact as early as next month.

The Xperia Blog has come across the user agent (UA) profiles of handsets with model numbers E6603 and E5803. The E6603 is speculated as the Xperia Z5 and the E5803 is the Xperia Z5 Compact.

The user agent profiles of both the handsets reveal that they will be powered by MSM8955 Snapdragon 810 chipset. The recently released Xperia Z3+ for international markets and the Xperia Z4 that is available in Japan are plagued with Snapdragon 810 chipset’s overheating problems. Hence, it seems that the Xperia Z5 and the Xperia Z5 Compact may feature the Snapdragon 810 v2.1 SoC that is free from thermal heating problems.

The display of the E6603 will arrive with the support for full HD resolution of 1080 x 1920 pixels. On the other hand, the E5803 will be sporting a display that supports a display resolution of 720 x 1280 pixels. The Xperia Z5 and Z5 Compact will be supporting storage of 32 GB.

The general manager of Sony Mobile Taiwan, Jonathan Lin had claimed in May that the company has no plans on offering Quad HD resolution on its forthcoming smartphones. Even though Sony had launched the gamer-focused Xperia Z4V (Verizon variant) for the U.S. customers, it seems that it may take more time for the company to launch Quad HD resolution supporting smartphones.

The report from Xperia Blog claims that the Sony Xperia Z5 and the Sony Xperia Z5 Compact will come preinstalled with Android 5.1.1 Lollipop OS. When the Android M OS will be officially rolled in the near future, Sony will make it available for several smartphones that belong to the Xperia Z handsets. Hence, it will also be made available for the unreleased Xperia Z5 and the Xperia Z5 Compact.

The Japanese tech giant will not be refreshing the design of the Xperia Z5 and Xperia Z5 Compact flagships. Hence, both the handsets are going to be premium smartphones featuring the Omnibalance design that company has been using since it launched Xperia Z handset in 2013, Phone Arena reported.