https://www.theverge.com/circuitbreaker/2017/9/13/16300930/apple-watch-lte-10-a-month-att-verizon-tmobile >If you’re in the market for an Apple Watch Series 3 with cellular in the US, it will cost you $10 a month for service on AT&T, T-Mobile, and Verizon. (This is after the first three months, which are free on all three carriers.) Sprint is the lone holdout to announce monthly pricing for the Apple Watch, but if it wants to stay competitive, it will likely offer a similar deal. >On Verizon, adding a smartwatch to your plan usually costs $5 a month, not $10, so it’s unclear why there is a price increase for the new Apple Watch. Both AT&T and T-Mobile have had $10 a month fees for smartwatches that share a number with your smartphone for years, but Verizon hasn’t shared that strategy, until now.