https://us.community.samsung.com/t5/Galaxy-S21/Losing-service-network-connection-after-UI-7-update/m-p/3373655#M97283 The issue is with the physical antenna and the new software update causing a corruption between them. The only way to fix it is to roll back the update which you need a degree in astrophysics to do. I had two other people I was conversing on other forms and they both did it. But they lost any security features that were included in the update Thu, 02 Oct 2025 13:59:11 GMT shojohn 2025-10-02T13:59:11Z