network preferred mode LTE ONLY

[hajaece08]

By Samsung not providing LTE ONLY mode  , it provides LTE/3G/2G, OR 3G/ 2G, OR 3G ONLY, OR 2G ONLY, so in india tamil nadu vodafone 4G service ok if 4g signal problems like 1point it automatically switches into 3G which is not work, 

So we need 4G only mode 

https://play.google.com/store/apps/details?id=www.extremedroid.com.a4gltetoolkit&hl=en_US&referrer=u...

This app provides to secretly change 4G only in settings,