If you need help selecting a business code for your Schedule
C business, use the link here to see a complete list of available codes
published by the IRS. Scroll all the way
toward the bottom of the page to see the beginning of the list: https://www.irs.gov/instructions/i1040sc/ch02.html#d0e308
Based on your description in your question, take a look at
this one:
454390 - Other direct selling establishments
(including door-to-door retailing, frozen food plan providers, party plan
merchandisers, & coffee-break service providers)
To answer your other question, you would not name your self-employment business Vivint because you
are working as an independent contractor for Vivint. Usually you would simply leave the business name blank for work as an independent
contractor.
https://ttlc.intuit.com/replies/3300135
