Tata photon max Wi-Fi. from this device and network of tata docomo. I am very dissatisfied. It’s very slow nad not give good coverage of network.i was using that device but now I sell it because that is wastage of money I was expected that it will be good for me but when I start using this product it’s not working well and network coverage is also very bad in my area.data plan is also very costly if I choose plan in mid range of prize they give it for less of validity.speed of data suffering is slower and data consuming is higher so guys I don’t suggest you to buy it.