Question Why did my assurance phone with unlimited data service stop working ?

Jan 16, 2023
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I have unlimited text, calls, and data. My service just stopped, I can't make phone calls, text and have no data. When I go to settings it says Sim card disconnected but when I call my phone from a different phone it goes straight to voicemail like it's still working. I also received email from assurance to make a phone call so I don't lose my service . Please anyone have any suggestions?