Yes, you can use Jio sim card with Tecno i3 mobile phone. Tecno i3 is a true 4g mobile 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.
Yes, Tecno I3 is a dual sim mobile phone.