@maskedwitch /me waves the secret pinephone daily driver¹ salute :D
I'm using cellular service rather than wifi more than half of the time, and I feel that these days it's way more reliable than it used to be: lately the main reason why I didn't have data service has been because I had not paid for it (ehm... :D ), or disabled international roaming because I live close to a border and then traveled internationally (double ehm...)
to be fair, I never use it for phone calls, only data, so I don't know whether receiving calls is reliable
(and I suspend a lot, because battery and not wanting notifications anyway)
¹ for values of “daily” where I don't use a phone every day