Surprising how the e-mail message differs from the setting language:
Allow CPNI sharing (toggle on/off)
Let Google Fi Wireless use and share your Customer Proprietary Network Information with Alphabet affiliates, including Google LLC, to offer you additional products, personalized offers, and services.
E-mail reads like CPNI is essential for service:
Google Fi uses your CPNI to:
Provide your Fi service and related features
Provide Internet access and voicemail
Provide protection from fraudulent, abusive, or unlawful use
Bill you for your Fi service
Provide customer support and troubleshooting when you need it