I have a recycled SIM which I legally own, which is linked to the prior owner's Aadhaar.
It will remain linked even if I link my SIM with my Aadhaar. (The Aadhaar->SIM mapping which the government uses is maintained by UIDAI and is not given out, the SIM->Aadhaar mapping which is mandated by DoT is maintained by KYC-regulations of my telecom provider at the telco level)
It will remain linked even if I link my SIM with my Aadhaar. (The Aadhaar->SIM mapping which the government uses is maintained by UIDAI and is not given out, the SIM->Aadhaar mapping which is mandated by DoT is maintained by KYC-regulations of my telecom provider at the telco level)