Straight talk
My carrier has been Straight Talk for several months. Is my Apple Watch compatible with Straight Talk?? I’m asking because I didn’t see Straight Talk on the list of carriers.
Make sure that you have an eligible cellular service plan with a supported carrier. Your iPhone and Apple Watch must use the same carrier, and you must be within your carrier's network when you set up cellular on your watch. For more info, see:
Set up cellular on Apple Watch - Apple Support
Apple Watch - Carriers - Apple