The Q520s runs Android 4.4.2 KitKat OS and supports dual SIM (WCDMA+GSM) with dual standby. It has 512MB RAM and is equipped with 4GB of internal storage that is further expandable with up to 32GB of microSD card.
The Xolo Q520s houses a 5MP PureCel rear-facing camera with LED Flash and also boasts a 0.3MP front shooter for video chatting. It is backed by a 1820mAh Li-ion battery, that is rated for up to 11 hours (3G) / 19hrs (2G) of talk-time and up to 527 hours (3G) / 610 hours (2G) of standby.
Connectivity options include Xolo Q520s FM Radio, Wi-Fi 802.11b/g/n, Bluetooth 4.0 with A2DP, micro-USB v2.0, mobile hotspot, GPS, and AGPS. It measures 123 x 63.8 x 9.7 mm.