Yes, Honor Holly 3 supports Reliance Jio network sim cards.
Honor Holly 3 comes with 5.5 Inch HD IPS display which is excellent to use under direct sunlight, too. The display has an aspect ratio of 16:9 which is ideal to watch movies or playing games. Honor Holly 3 supports 16 million colors reproduction. The display is made of highly toughened aluminosilicate glass, which is almost 3 times tougher than the regular display glass. The contrast ratio is of 1000:1.
No. Honor Holly 3 does not have earphone or headset as part of standard in-the-box accessories.
No. Honor Holly 3 do not support OTG.