It does take about 2 hours time to fully charge the JioPhone's 2000 mAh battery.
Yes, you can type message in the Gujarati language in the JioPhone.
Yes, JioPhone does have the NFC sensor.
No. There is no WhatsApp support in JioPhone.
JioPhone has 2.4 Inch QVGA TFT screen display. It has about 167 PPI ratio.