Im also one of the jio do few steps i do the for best result
step1- put ur jio sim in primary sim slot(mostly primary slot is first sim slot)
step2- perferred network set LTE ONLY OR LTE/...../....
step3-APN create new
step4-name JIO NET inner name -JIONET
step5-server name- WWW.GOOGLE.COM
step6-APN PROTOCOL=ipv4/ipv6
step7-bearer=LTE
step8-save APN SET AS DEFAULT
ENJOY THE SPEED INTERNET
PUT LIKE U LIKE THIS
step1- put ur jio sim in primary sim slot(mostly primary slot is first sim slot)
step2- perferred network set LTE ONLY OR LTE/...../....
step3-APN create new
step4-name JIO NET inner name -JIONET
step5-server name- WWW.GOOGLE.COM
step6-APN PROTOCOL=ipv4/ipv6
step7-bearer=LTE
step8-save APN SET AS DEFAULT
ENJOY THE SPEED INTERNET
PUT LIKE U LIKE THIS