OnePlus today announced the OnePlus 3T, an upgrade to the OnePlus 3 it had launched earlier this year. Both the phones are quite similar, the company says, save for a more powerful processor -- Qualcomm's Snapdragon 821 processor, and increased storage -- 64GB and 128GB. The price of the OnePlus 3T starts at $439, with the top model breaking the bank at $479. HotHardware adds:The most prominent change is the addition of a Qualcomm Snapdragon 821 processor (in place the "old" Snapdragon 820). The SoC is still paired with 6GB of RAM, and up to 128GB of internal storage can be ordered. The 16MP rear camera remains, but the front-facing "selfie" camera has been upgraded from 8MP to 16MP (Samsung 3P8SP sensor). It incorporates an f/2.0 lens and features phase detection autofocus (PDAF). The OnePlus 3T can also capture automatic selfies when you smile for the camera. Another big upgrade comes from the internal battery. The OnePlus 3 shipped with a 3,000 mAh battery -- the OnePlus 3T counters with larger 3,400 mAh battery to further boost your runtimes. Despite the larger battery, the OnePlus 3T still weighs the same as its predecessor: 158 grams. Other features include a 5.5-inch 1080p display (still no QHD here), USB Type-C connector for charging/connectivity, and the latest version of OxygenOS, which is still based on Android 6.0 Marshmallow instead of the current Android 7.0 Nougat.