Question: samsung grand 2 how to use jio sim?
Answer: You need to download both Xorware 2G/3G/4G Switcher & Xorware 2G/3G/4G Interface App.
Then Open App and choose the network settings.
After that Select Network Mode to 4G LTE.
Simply click on Apply and make your changes.
Now you can Switch off your or restart your device.
And enjoy jio 4g in 3g.