I recently purchased reliance JioFi because I did not have 4G phone and I think why not to share my experiance
JioFi is basically is a dongle but it is not a traditional dongle but is more advance then any of out there through jiofi first thing I noticed that the slickeness of the device the design was very good and build was also good . I accidently dropped it for 2 times but nothing happen to the device .
when it comes to the speed of the connection I tested both jiofi and through Jio phone sim in 4g mobile(friend’s mobile) and I have to say the speed and reliability of jiofi is more then in phone . The only conclusion I make from it was that jiofi was basically design for transmitting data from dongle to phone and comp but phone has to deal with lots of complicated things to do the conclusion is that if you want best speed buy jiofi a good invest to do .
from jiofi not only you can use to use data on phone and comp but it also let you to use jio free calling through jio calling apk the only thing you have to do is to install the jio installing apk from apk store and you are good to go .
the service is very good as my jio sim inside jio fi was activated within 2 hrs of purchase and I did’nt get any difficulty from service so I did not call for service center but I heared from my friends that the service and call centers are very friendly .
important - one thing I noticesd after using jiofi is that it significantly increased my phones battery as wifi uses less power as compare to all time on data services on my mobile and the convinence of using jio is very appreciatable as once chared it worked full one day for me and battery is very good . :-)