How to run jio 4g sim in any 3g android devise

How to run jio 4g sim in any 3g android devise
Reliance Jio 4G Sim is free for all users and it also give unlimited 4G internet, unlimited HD Voice Calling and SMS. Butthe problem with the sim card is that, it only works on 4G mobile phones but hereI'm giving you a trick to use Jio Sim in all 3G mobiles.Requirements:1.Rooted Android phone. If your phone isnot rooted read this article"How to root Android Phone"and "Advantages of Anroid rooting".2. To avoid risk Android version 4.4(KitKat) or up  more preferable.3.Mediatek Processor device.4.MTK Engineering Mode Application.Download-[Click Here]How To Use Jio 4G Sim on 3G Mobile Phones:Note: This trick will work only for Mediatek processor devices. So, before using this trick please check your mobile phone specifications whether it has Mediatek Chipset or not.#1.First download and install"MTK Engineering Mode" appon your device.#2.After installing, Open the app and select Setting"MTK Setting".  #3.Then select "Network Selecting" option.**If "MTK Setting" Mode not Open, try"Android Setting" Option**#4.Now you have to select "4G LTE/ WCDMA /GSM" as network mode and save it.#5.Turn off your mobile phone and put Jio Sim in first sim slot.#6.Turn on your phone. Once you done the above steps, within 10 minutes you will get Jio Networks.Note: Use this secret menu very carefully.Don't change any other values because itmay damage your phone. By using this app you can run Advanced setup from"Engineering Mode" menu of MTK phone.