No, I have had issues just with security questions about my Verizon phone so I doubt they can do repairs there!!!
Yes, you can bring your own phone if it has a sim card. They will check it to see if it is compatible. I Switched a Samsung S8+ from Sprint.
Pretty much no. They will only trouble shoot and work on Verizon branded phones only
I don't think so, there's a place up the road called ReCell shop that may be able to fix it
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