I use reliance jio sim since 15 days .Starting speed of 2 GB is better but before using the sim with all jio apps the speed of download is 1 MBps and speed of upload is 0.12 mbps. When I call anyone .I try 3-4 times when call reached and when I turned off my internet I will not receive any call .so I suggest to you It’s not working like other 4G sim speed is like 3G