Check the SIM registration details in the mobile carrier’s official app or website
Contact the mobile network’s customer support and ask for the registered owner name
Visit the carrier’s store or service center with valid ID to verify the SIM registration
Check the SIM registration SMS or documents received at the time of purchase
Use the phone’s SIM management settings only if the carrier displays the registered name
Ask the person who purchased or registered the SIM card
Use official government telecom verification services if available in your country
Do not use unauthorized apps or websites to try to find SIM owner details