Connectivity is where the gap between these two devices becomes most consequential. The most headline difference is cellular generation: the Redmi 15 5G supports 5G, while the Poco M7 4G is limited to 4G LTE. This directly explains the dramatic disparity in peak data speeds — the Redmi 15 5G reaches theoretical download speeds of 2500 Mbps versus the Poco's 390 Mbps, and upload speeds of 1500 Mbps against just 150 Mbps. In practical terms, in areas with 5G coverage, the Redmi will handle large file transfers, cloud syncing, and video streaming far more swiftly, and its longevity as a connected device in an increasingly 5G world is inherently stronger.
Away from cellular, the two phones are largely level: both share Wi-Fi 5 support, USB Type-C 2.0, NFC, dual SIM, GPS, and a fingerprint scanner. The Redmi 15 5G edges ahead slightly with Bluetooth 5.1 versus the Poco's 5.0 — a marginal improvement in connection stability and directionality that most users will never consciously notice. One area where the Poco M7 4G counters is the inclusion of a microSD card slot, which the Redmi 15 5G lacks entirely. For users who rely on expandable storage to supplement internal capacity, this is a genuine and practical advantage.
On balance, the Redmi 15 5G holds a decisive connectivity edge, driven overwhelmingly by its 5G support and the dramatically higher data throughput that comes with it. The Poco M7 4G's expandable storage is a useful trade-off for some, but it cannot offset the forward-looking network advantage the Redmi carries.