If you got a A1901 / GSM-only / AT&T / T-Mobile / MQAJ2LL/A iPhone X, it turns out you can still use it to almost full capacity on a Verizon CDMA network.
I’ve been switching up my primary personal phone about twice a year for a while now and have been on an iPhone SE for the past 6 months despite not particularly liking iOS or any of Apple’s bundled services.