Connectivity is where the Poco C71 builds its most comprehensive advantage over the A90. Starting with wireless networking, the Poco C71 supports both Wi-Fi 4 and Wi-Fi 5 (802.11ac), while the A90 is limited to Wi-Fi 4 (802.11n) only. Wi-Fi 5 delivers faster throughput and better performance in congested network environments — a tangible upgrade for users who stream high-quality video or live in densely populated areas with many competing networks. Similarly, the Poco C71's Bluetooth 5.2 versus the A90's 4.2 represents a meaningful generational jump, bringing improved range, more stable connections, and better support for multiple simultaneous Bluetooth devices.
Two further differentiators compound the Poco C71's lead. It includes an external memory card slot — absent on the A90 — which is especially significant given that the Poco C71 ships with less internal storage than the A90. The ability to expand storage via a microSD card effectively neutralizes that disadvantage. Additionally, the Poco C71 has a built-in compass, a sensor the A90 lacks, which enables proper map orientation in navigation apps without needing to rely solely on GPS directional estimates.
Both phones share USB Type-C 2.0, dual SIM support, a fingerprint scanner, GPS with Galileo, and an accelerometer, so the foundational connectivity and sensor baseline is solid on each. But the cumulative weight of Wi-Fi 5, Bluetooth 5.2, expandable storage, and a compass gives the Poco C71 a clear and decisive advantage in this category — these are not superficial additions but features with direct, everyday utility.