Reliance Jio is The Best 4G sim card in india .This is my opinion Becase jio comes with free 4G interney and calls This Time Most of the smartphone company are make So many phones and they sell very well
For example LYF
LYF mobile is chepest rate android mobile comes with 4G support and they give Free Jio4G sim Most Of The people buy LYF mobile phones
But the phone Quality is very low
But LYF Company Make Make using The Jio sim
Now a days 4G free service is ended But They provide good Offers