https://us.community.samsung.com/t5/Galaxy-S21/Can-Make-Call-with-a-One-Specific-Number/m-p/3398579#M97503 Contact your mobile service provider to report the issue, as it could be a bad SIM card that needs replacing.  Tue, 04 Nov 2025 11:13:56 GMT Pianodude58 2025-11-04T11:13:56Z