It's the same situation here, no band 3 and 40 in indoor, only band 5 comes and that too very low signal so I have to keep my JioFi in terrace so that I can catch band 40, fortunately there is no obstruction from tower to my terrace and I get a clear view of Jio tower(200 m away) otherwise investing on JioFi would be a big loss. This is the max strength I get