SOLUTION:-
FIRST YOU NEED TO HAVE A ROOTED ANDROID 4G HANDSET ....
THEN INSTALL XPOSED INSTALLER APP....
NOW DOWNLOAD IMEI CHANGER APP IN YOUR MOBILE....
NOW GO TO XPOSED INSTALLER & ACTIVATE FRAMEWORK THEN GO TO MODULES TICK OM IMEI CHANGER PRO APP...
NOW OPEN IMEI CHANGER APP IN YOUR MOBILE AND ENTER THE IMEI NUMBER OF YOUR LYF MOBILE IN THE APP AND CLICK ON APPLY BUTTON...
LYF FLAME 2 IMEI SERIES 911501450159XXX REPLACE WITH XXX ANY THREE DIGIT RANDOM NUMBER....
NOW SWITCH OFF YOUR MOBILE PHONE AND INSERT YOUR JIO SIM CARD IN SLOT 1.
AND RESTART YOUR PHONE ...
NOW JIO SIM WILL BE ACTIVATED IN ANOTHER MOBILE AND IF U DONT GET SIGNAL THEN GO TO SETTING>MORE>MOBILE NETWORK>NETWORK OPERATERS>SEARCH MANUALLY CHOOSE RELIENCE JIO....
AFTER THAT AGAIN GO TO SETTING >MORE>MOBILE NETWORKS>ACCESS POINT NAMES>CREATE NEW
APN*.NAME:AKSHAY TRICKS
APN:JIONET
AND
LEAVE BLANK ALL OPTION
NOW GO TO DIALER AND TYPE *#*#4636#*#*
AND NOW SELECT LTE ONLY OPTION...
NOW OPEN PLAYSTORE AND DOWNLOAD JIO JOIN APP
AND CONFIGURE WITH YOUR JIO 4G SIM.*.THAT'S IT NOW TORN YOUR MOBILE DATA SERVICES ON & ENJOY TRUE UNLIMITED 4G DATA IN ANY MOBILE PHONE VIA RELIENCE JIO 4G SIM CARD.....