With some Apple Watch Series 3 models gaining cellular support, the big unknown from Apple's event was the cost of that add-on to users' existing phone plans. We've now had that answer as AT&T and Verizon have revealed to The Street that they will both charge $10 per month. T-Mobile also confirmed to iDB reader Matthew M. that the carrier will also be charging $10 per month.
AT&T, Verizon, and T-Mobile will charge $10 per month for cellular Apple Watch service
