It should be $5/month max, particularly when you’re already paying for an expensive unlimited data plan.
T-Mobile has two watch plans - unlimited high speed data for $10/mo or 500MB high speed data for $5/mo -- after autopay discount and including all taxes & fees.
I pay $10. It use to be $5 but sometime over the last 3 years they upped it. I need to check my plan.
Check your plan to see if you're on the 500MB or unlimited plan.
Interesting but do you actually use and pay it? Reason I ask is, I thought I saw that advertised too, then when I went to ask about setting it up they would not do so without a bunch of fees, similar to what OP described for Verizon.
Yes, for multiple years. My bill on T-Mobile Magenta 55+ plan is $75 per month. Total cost, all in. $70 for two lines then $5 for my watch line.
Basically it seems to me that most watch cellular users in the USA must be on one of the 3 big telecomes already, paying 50-100 or more already for phone. People like me who never avoid those companies like the plague are SOL since most smaller companies don’t offer watch service at all.
Check out Visible - they're a US prepaid carrier that offers an Apple Watch plan.