So, finally, the most awesomest SIM portfolio should be:
1. Personal, friends, etc
2. Financial use, Bank apps, shopping apps, and Not shared with anyone else.
3. Aadhaar use, number never given to anyone else, nor stored in any phone. Put it in a dumb phone and keep at home.
4. Work, shitty apps like cred, people we don't want to talk to,
#3 and #4 make sense.
But, is #3 practically doable?
#2 seems not feasible practically!