If I elect to buy new I watch with cellular capability, is there an additional cost from my cellular provider?
Apple Watch
In the United States I pay AT&T an extra $10/month plus applicable taxes bringing the total additional costs up to approximately $16/month.
Make sure your iPhone carrier supports the Apple Watch if you decide to get an Apple Watch
Cellular Carriers that support the Apple Watch, which models, and the radio frequencies each model uses:
In most cases your network will have an additional charge for the extra function to host the watch on your iPhone plan
Carrier costs with I watch
