Connectivity and Battery Life
In terms of connectivity, the Celkon C90 supports GSM 900/1800 2G networks, with dual SIM slots allowing users greater flexibility in managing personal and work contacts. Bluetooth 2.0 allows simple file sharing between compatible devices. Importantly, its removable 1000 mAh Li-Ion battery delivers a commendable standby time of up to 300 hours and talk time of up to 8 hours and 20 minutes, favoring users who require long-lasting battery life over advanced features.