After the recent Supreme court verdict, payments bank, and e-wallet companies like Paytm had so far been insisting customers get their KYC done using Aadhaar card and had warned account holders that their services will be blocked in case of failure. Now they cannot seek Aadhaar data. You would still need to fulfill other KYC criteria but Aadhaar authentication for bank accounts is now a thing of the past.
Second thing is to buy a new SIM card, your telecom service provider cannot seek Aadhaar details from you. Just provide other KYC documents like Voter ID card, driving license, etc to get a new SIM card. Justice Chandrachud has favored deletion of consumers’ aadhaar data by mobile service providers.