Here is my JioFi JMR815 review. This is a personal Hotspot, a WiFi router that will allow you to share your Reliance Jio 4G data with up to 31 devices. You need to put in the JIO SIM and share data with others / other devices. Reliance Jio JMR815 comes with micro SD card slot you can share the data on that card too. Max 64GB micro SD card is supported and Download speed of this router is 150Mbps. Weight is 95 grams and there is a 3000 mAh removable battery. This Jio JioFi comes with 1 year warranty and you can buy this from Flipkart I did buied but its a usless device and I highly recommend you not to buy this product in any cost