The Xperia 1, like the Xperia XZ2 that started it, has the standard 3.5 mm audio jack omitted in favor of wireless. To make up for the removal, it has improved wireless audio connectivity along with LDAC, an audio coding technology developed in-house by Sony which is now a part of the Android Open Source Project, that enables the transmission of 24-bit/96 kHz High-Resolution (Hi-Res) audio content over Bluetooth at up to 990 kbit/s, three times faster than conventional audio streaming codecs, to compatible audio devices. It also comes with Dolby Atmos for a better sound reproduction. Other connectivity options include Bluetooth 5 with aptX HD and Low Energy, NFC, 4x4 MIMO antennas for fast WI-Fi and cellular upload/download speeds, dual-band Wi-Fi a/b/g/n/ac, Wi-Fi Direct, DLNA, GPS (with A-GPS), GLONASS, BeiDou and Galileo satellite positioning. The Xperia 1, like most high-end smartphone nowadays, has no FM radio. The Sony Xperia 1 is launched with the Android 9.0 "Pie" operating system, along with Smart Stamina battery saving modes and Sony's proprietary multimedia apps. It features an improved "Side Sense". It works through a pair of touch-sensitive areas on either side of the phone. A tap or slide triggers various actions set by the user, most of which configurable including the sensitivity of the touch areas. Another feature by the Side Sense is "Pair shortcut" which, upon launch from the Side Sense window, will trigger a split-screen setup with the selected pair of user-customizable apps instantly. In December 2019, Sony began to release Android 10 for the Xperia 1.