It is very helpful for the primitive type of 4G mobiles. When you have a good internet network then it’ll be nice.
But as you know there is no uniform intensity of network and the connectivity is often disturbed some time very difficult to make a call with this. You’ll have to wait for being online. Only after that you can make a call.
Now a days it become hard to make right call at a right time.
There are a lot of cross connection incidents are being seeing.
Call drop is another severe problem.