Jio hotspot device is good. its market prize without sim is 999 rupees. iam using this device from 4 months and this is working
very well.
you can conect up to 31 devices with this.
it supports up to 32 gb micro sd card.
its battery is 2600 mah when u charge it full u can work with this 5 to 6hours.
u can conect any 3g and 4g smartphone with this and enjoy unlimited voice and video calling .
it gives you maximum 4 to 5 mb pr second data.