Every indian cannot use the jio sim because of some reason which one is . I have a 4g mobile set lenovo which is working properly but when I insert jio sim I cannot call regularly. manny time when I dial a call they drop the call continuesly. then I stop using jio sim for calling, now I use jio sim only for net. second problem is the call log also different then phone set default log. and on starting jio sim internet very fast but now after one month net speed going slow. jio sim based only on internet not a GSM sim like other companys.