Which iPhone works with Verizon, Sprint and AT&T ?

Hello DavidWinston,
I understand you have questions about the iPhone SE Model A1723.
All iPhone models are world phones so that you can use them almost anywhere. Whether you are a GSM or CDMA network customer, you can roam internationally on GSM networks in over 200 countries around the world. Availability of LTE data varies in some countries and depends on carrier support for certain LTE radio frequencies. Contact your wireless carrier for more information regarding international roaming policies and rates.
For more information, please visit our FAQ section on this website: http://www.apple.com/shop/buy-iphone/iphone-se
From: iPhone SE - Technical Specifications

Model A1723*

• LTE (Bands 1, 2, 3, 4, 5, 7, 8, 12, 17, 18, 19, 20, 25, 26, 28)
• TD‑LTE (Bands 38, 39, 40, 41)
• TD‑SCDMA 1900 (F), 2000 (A)
• CDMA EV‑DO Rev. A (800, 1700/2100, 1900, 2100 MHz)
• UMTS/HSPA+/DC‑HSDPA (850, 900, 1700/2100, 1900, 2100 MHz)
• GSM/EDGE (850, 900, 1800, 1900 MHz)

For details on LTE support, contact your carrier and see www.apple.com/iphone/LTE/. Cellular technology support is based on iPhone model number and configuration for either CDMA or GSM networks.