On strictly cell phones, which are line of sight communications, the answer is NO.
However, if you bundle your Cell service with satellite communications like, TV or streaming, the answer is Yes.
When communication satellites, which are fixed orbits or geo-stationary, directly line up with the Sun at its "back" [so to speak] there will be several minutes of lost signal.
The Sun will evenly pass out of that exact alignment.
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I am not sure about Sumter SC issues.
Jim...
PS: Hughs net, which is remote, internet, is a classic example