No Service at all?

I have an iPhone 11 and I live in Puerto Rico. The service went off Friday morning, zero, no bars and has not changed status at all? I have turned roaming on and off multiple times and it is on now?  I have turned the phone off and on multiple times. I have turned airplane mode off and on multiple times. I have gone through the trouble shooting guide at Verzon ? 

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Re: No Service at all?
Customer Service Rep

Hi there, Duane. My name is Heather. Your Verizon Wireless account expert. Thank you so much for reaching out on Chat today. I understand the importance of having service. You do want to keep the Roaming on Verizon does not any of there own Towers in this location. Have you tried changing the Network Operators under the Cellular settings in your phone?