You have way too much time of doing nothing of significance and fill it with meaningless chatter. Spend more expanding job skills and still listening to so many inexperienced opinions.

Stick with only having a landline until you can get over yourself and your self aggrandizment.

Any AOSP ROM would suffice.

The queation pertains to having a sense from how someone talks if they sound like they can configure network services or if they only read about it but not having the skills/experience to work for random customers and explain the work to them.

I think you’re mainly speaking from a place of percieved opinion than tech knowledge but I would suggest for you that you only use a landline for phone service. Have you ever had a job working with various network services for random customers and speak to customers to answer questions?

Why does a phone need to be in a ferriday bag when phone does not have a SIM card because it uses web-based VoIP service? The phone only needs an internet connection, like wi-fi, and can’t talk to cell towers. Remove SIM from phone, connect phone to wi-fi to get online to access phone service through the internet, GPS can’t function. If a phone without SIM calls 911, it will go through, but dispatch sees no number, no location, no name.

How can cell towers track your location if phone does not have a SIM due to using web-based VoIP service?

It is possible to get a real cell number from a big name carrier and then port the number to VoIP company to use VoIP service with an original cell number.

Switch phone service to VoIP, cancel cell service, all tracking capabilities is gone.