@Sagar bro please keep the XStream Box model which u have got,,it is somewhat better than latest variant XStream Box. Also the box which u have got is brand new and not some used/refurbished box. If u would have got new variant still i would have suggested to try and request airtel to give u the old variant XStream STB as it scores over new one on some parameters.
It is "not" that New Variant Xstream box is not good but overall user experience wise old variant is somewhat better....rest is ur choice. I am just suggesting as later u may want to switch back to this box