Here is a simple method for phones that have Mediatek processor or Qualcomn
(It is necessary to activate the SIM card before goingto make this process if SIM Jio is not enabled then check the process of this article).
1. First of all you should check your phone's processor by using CPU Z app. It is available in google play store. Click Here to install.
2.After installing the app you just open the app.
3.wait some time for getting the information. If your phone has the mediatek or Qualcomm processor .If your device is using Mediatek or Qualcomm Chipset then it will reflect with the
Logo of Mediatek Chipset on the screen.
(Use this method very carefully. In case if you don’t know on what you are doing then just stop it or don’t do it)
1.First Download & Install MTK Engineering Mode app in your 3G mobile device.The MTK engineering app is available in play store.
This Application will allow you to run an advanced Setup from the Engineering Mode Menu of MTK phones, which is also called service mode
2.Open the MTK Engineering app. Then Click on the MTK Settings and Select Preferred Network Option.
3.Now you can Select 4G LTE/WCDMA/GSM as network mode and you can save it and switch off your device.
3. Then Insert the Reliance Jio 4G sim card in 1st Slot and keep the 2nd Slot empty.
4.Switch on the device and then you will see jio sim network.
PLEASE NOTE: Gizng will not be responsible if anything goes wrong during the process.