Finally, I could see both Saphiro amex and MasterCard in imobile app. And received message for the call dispatch. Will check LTF status once card is received.
Even I received a similar call but from different number (+912269490766). She said that in 3-4 days virtual card would be visible in iMobile and in 7-8 days card would be delivered in the registered address. She just confirmed my pincode and city by her self and I just said "YES" :)
I was using regalia gold for monthly 5K and Tata neu infinity for all upi transaction approx. 10K per month. Swiggy occasionally for swiggy dine out/or any 5% online.
I hold regalia gold along with Tata neu infinity and swiggy. All LTF. Got 47% limit increase offer on regalia gold. Next day other cards limits also got changed to regalia gold limit. As these are shared limit card