This 4g nerwork is provide good internet speed but only limited area most of state, village are not support idea 4g network.So I think the technical issue and some network bug suddenly disturbing while internet surfing. Suddenly 4g network not catch so it show emargency call only.
I am bought this idea 4g LTE in 18 september 2017 but till now no 4g net work find in my area.And when 4g nerwork show in every half hour after its network was gone.