Hello Friends! Today, I am going to share my bad experience, views and opinions on JioFi JMR815 Wireless Data Card with all of you to aware you about the faults and problems with this device I have faced.Its internet speed is very very low. It is described its download speed as upto 150 mbps which is totally false. Its download speed is about 2 mbps and its upload speed is about half mbps which is very low as compared to the described speed. So if you are purchasing it for its great internet speed then do not purchase it.The next problem is associated with connection. Its connection is very weak and its connecting area is very less. Its connecting area is about 5-6 meters which is quite equal to connecting area of a mobile hotspot.Its service problem is a great issue. There is service center on jio in my city and so I have to go to out of station for its service. It supports jio 4 g sim only. We can not use only other company sim in it.With all these problems, I am not happy with it.I do not recommend others to purchase it.It is wastage of money.Thank You!