I am using this device since last year December . this device is powered by Power-full 2600 mAh of battery.user can connect up-to 32(31 on wi-fi+ 1 on usb tethering) device at a time.
internet speed is awesome at my place, I dnt found network issues while I was on train, its network is awesome, its service is better then jio sim, even it also works on sim,
Wireless sharing is also available because we can insert sd card in jiofi-3, we can enjoy jio HD calls, messaging on your 2/3G phones by via jio 4G voice app.
Battery back is awesome, I dont get any problem with device.i am satisfied with this device, sometime net was slow due to server problem, but over all it is okey
DONT know about others but according to me its service and support is quite good.
after connecting more then 2-3 device internet speed is effected.but for single purpose this device is awesome.not any fault with connecting with any type of devices, this product is good at this price.