I got fed up with Idea 4G promotion audio message. daily during first call.
One need to cut and call again .if it is urgent call.
Even after calling customer care and activating DND, this promotion is unstoppable:).One fine day lost my cool, shifted to another network.
I still keep the SIM with me, as I get incoming SMS free, even when I’m roaming in UK. Unlike Vodafone(though Vodafone seems to be biggest networks in UK). Or some other Indian networks