Customer Service
Phone support
Menu path: Say "billing" or press 2 for billing; say "technical support" or press 4 for Fios tech support.
Verified contact endpoint from cited source.
Source: Official | Confidence: high
Email support
No publicly listed direct support email for Fios. Use this official message/contact flow instead.
Source: Official | Confidence: medium
Help center
https://www.verizon.com/support/residential/contact-us/contactuslanding.html
Official help center landing page.
Source: Official | Confidence: high