How To Increase Or Double your JIO Speed

first of all,

 you have to Install MTK Engineering mode From Play Store

then open it and run application ,

select MTK Setting then BandMode

Select SIM Slot Where You Have Placed your jio Sim

Select LTE Mode

Thats Done.

After That Select Band 40 For Best Speed or Band 5 For Best Coverage

Enjoy Double speed in Jio .