I found it interesting to read that GMAIL can be quite anal about account creation. I have one from years back. Hardly ever use it. But I have noticed that GMAIL accounts seem to be the email service of choice on Craigslist (Casual Encounters). I better explain myself here. I live in area that is well protected by the police. But one night I went out to pick up a pizza, halftime, and I was outside by my car waiting, and was approached by a Lady of the Evening. I was kind of stunned. So I started monitoring Craigslist. I said all this to bring up my experiences with Outlook.com.
I set up 3 accounts, all using the "Alternate email address" option. One for my father, stop his griping about GMAIL, one for a friend to keep in touch while I was on a roadtrip in Oregon, and another one for me. Once set up, I tested them out, send/recieve an email. Within few days, all were "Temporarily Suspended", for some unspecified "possible" violation of ToS. To unlock them I would be require to provide a text able phone number to recieve an activation code, and require to use the code within 10 minutes. Now I did not create these accounts all at once, there were months in between. I am just waiting for the day, when my other accounts, which I have had for years, multiple accounts were needed in the days before email aliases, to recieve the same treatment. So I am not really hot on the idea of providing them my phone number, especially after this type of treatment. Therefore, what they call "burner phone", I guess is the solution. Suggestions would be appreciated on a "burner phone". I remember years ago, when there was talk of the government controlling the internet, and websites protested by turning their backgrounds to black. That today there are many large tech companies now applying their own version of privacy invasion (tracking) and censorship.
http://www.salon.com/2017/08/23/mark-zuckerberg-might-be-the...
https://www.theatlantic.com/magazine/archive/2017/09/when-si...