It appears confirmed from Apple's site that there are only 1 model of each size with both containing both CDMA and LTE. https://www.apple.com/iphone-xs/specs/
So changing carriers later etc wont be so painful requiring buying a new phone; only Verizon phones supported CDMA and GSM in prior years.
Model A1920*
So changing carriers later etc wont be so painful requiring buying a new phone; only Verizon phones supported CDMA and GSM in prior years.
Model A1920*
- FDD‑LTE (Bands 1, 2, 3, 4, 5, 7, 8, 12, 13, 14, 17, 18, 19, 20, 25, 26, 29, 30, 32, 66, 71)
- TD‑LTE (Bands 34, 38, 39, 40, 41, 46)
- CDMA EV-DO Rev. A (800, 1900 MHz)
- UMTS/HSPA+/DC-HSDPA (850, 900, 1700/2100, 1900, 2100 MHz)
- GSM/EDGE (850, 900, 1800, 1900 MHz)
- FDD‑LTE (Bands 1, 2, 3, 4, 5, 7, 8, 12, 13, 14, 17, 18, 19, 20, 25, 26, 29, 30, 32, 66, 71)
- TD‑LTE (Bands 34, 38, 39, 40, 41, 46)
- CDMA EV-DO Rev. A (800, 1900 MHz)
- UMTS/HSPA+/DC-HSDPA (850, 900, 1700/2100, 1900, 2100 MHz)
- GSM/EDGE (850, 900, 1800, 1900 MHz)