Got it, the thing is your device falls back to 2G during calling and auto blocker on maximum doesn't support 2G . Probably your area have problems in 3G calling, previously here also we got problems in 3G.
I have my primary Sim BSNL with VoLTE activated. That's why call getting connected,but 2G getting off (as in SS) in your case 3G preffered restricts it to search for 4g, also 2G is not available , that's why when putting auto blocker maximum you're unable to make call.
I will suggest you to put it on 5G preferred and activate VoLTE via customer care. Also If your sim is older , swap it with 5G ready one.
I have my primary Sim BSNL with VoLTE activated. That's why call getting connected,but 2G getting off (as in SS) in your case 3G preffered restricts it to search for 4g, also 2G is not available , that's why when putting auto blocker maximum you're unable to make call.
I will suggest you to put it on 5G preferred and activate VoLTE via customer care. Also If your sim is older , swap it with 5G ready one.
FAQ for Samsung Mobile. Find more about what to do when your galaxy device is unable to make or receive calls with Samsung Support.
Accessibility, reset, hard reset, master reset, network reset, factory reset, all settings, FAQ for Samsung Mobile Device. Find more about 'Samsung Galaxy Mobile: How to perform a factory reset?' with Samsung Support.
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