How can I change LTE band in Exynos(Samsung J7 Prime)?

As JIO is providing me super low speed which ranges from 10kbps to a 50kbps, I wanted to change its LTE band so that I could get good browsing/downloading speed. It'll be glad if anybody could help me in this case.
My chipset is Exynos
Mobile is J7 Prime
Network mode LTE

I don't remember properly but, same as mtk/mediatek, exynos also has a EngineerMode/Service Mode
You can change band there without root also u can force to use 2g only if 2g only dosent support while internet
Search GOOGLE/Youtube to find how to enter Service Mode

simply root and use network signal guru app

Kalim Siddiqui said:

simply root and use network signal guru app

Click to expand...

Network Signal Guru was built specially for Soc Snapdragon devices,
Yeah, it may work little for Exynos but, it will cause error,issues
Even its need root though, Service mode is built in service which dosen't need root

root to warrinty avoid

Root and use Network Signal Guru was built specially for Soc Snapdragon devices

don't try bro it is dangerous you might end with no signal if not worked