I have two phones, one of which supports 4G. I downloaded the Jio app on that phone and later got the card, and am using it without any problems. I've read on the Internet that the Jio card can also be plugged into a non-4G, 3G kind of phone. Has anyone tried this, using the Jio card in a 3G phone? I have a Xolo Q800 which is not 4G; suppose I want to use the Jio card in this phone, should I download the Jio app in the Xolo phone and generate the code from there or use the other 4G phone for this? I have already used the 4G phone for getting one card and am using that phone with the Jio card installed.