Apple watch series 7

Hi sandy9joshi,

Thank you for using the Apple Support Communities. Certain feature availability will vary by region. Also as noted in the following resource "To cover the LTE and UMTS bands used around the world, there are two separate cellular models for Apple Watch Series 7 and Apple Watch SE. They have been optimized for use in the country of purchase, and not all models work in all countries or regions. There is no single model that supports cellular service worldwide.":

Apple Watch GPS + Cellular

For feature availability: watchOS Feature Availability

Hope this helps!

Have a great day.