I run my personal PauseOS since the early 2000s.
1. My phones are always data offline, except when I use the internet browser to read news or retrieve information. If someone wants to contact me they can send SMS or call.
2. There is no email client configured on my phone.
3. GPS is always off (not so much for pausing reasons, but to maintain orienteering skills and resist surveillance capitalism
I used SymbianOS 2000 - 2014. MeeGo 2007 - 2014. SailfishOS 2014 - now, Android without Google account 2024 - now.