No. You can use only one 4g sim card in this phone.
Tecno i3 comes with the latest Android 7.0 Nougat OS. In future, you can update phone OS if the new update gets released from the company.
Tecno i3 comes with 3050 mAh non-removable battery, which can last a day's usage easily.
Tecno i3 has G-sensor, Proximity sensor and Ambient light sensor.