T40 Pro uses sweet 4 audio system with an intelligent digital power amplifier chip, audio is clearer and louder. The new dual digital microphone array for even crisper calls and recording. T40 Pro gives you the ultimate mobile gaming experience. Its mali-G52 multi-core GPU is Bifrost architecture based and supports Vulkan, ES3.2, et graphics API, rendering mobile games uals with even more Amazing effects. Fast ac dual-band Wi-Fi and efficient Bluetooth-compatible 5.0 wireless connection keep you always in reach with communication and entertainment. Dual SIM/Micro SD slot and support for TD-LTE and FDD-LTE 4G networks, allow you to freely switch between work and life, VoLTE for simultaneous calls and network. T40 Pro suports BDS, GPS, GLONASS, GALILEO all 4 major satellite navigation systems, and supports A-GPS internet-assisted positioning, giving you faster and more precise direction navigation.