AT&T, Verizon, Sprint, and T-Mobile to support cellular Apple Watch Series 3

Update: AT&T, T-Mobile, and Verizon have all announced $10/month plans with an initial three months of free service.
Today’s announcement of the Apple Watch Series 3 with cellular support included details on how the device will function with wireless carrier plans. Apple mentioned that the phone number from the iPhone will remain the same and be usable on the Watch.
There is one obvious caveat though: to get the cellular functionality of your Watch, you may be required to pay