The T-Mobile and AT&T Apple Watch plans look close on the sticker, and that’s exactly the trap. Between them they sell 3 watch lines, and the number on the plan page is rarely the number on your bill: some prices only apply if your phone plan qualifies, some need AutoPay, and taxes land on top of most of them.
So this page lines up every watch line each carrier sells, then shows what it actually costs once tax and the fine print are counted. Every price links back to the carrier’s own page so you can check it yourself.
The short answer
- T-Mobile: 2 Apple Watch lines, from $10/mo (Watch Plan 2.0), about $12.60 to $12.80 a month estimated with tax. Requires AutoPay.
- AT&T: 1 Apple Watch line, from $10.99/mo (NumberSync smartwatch line), about $13.85 to $14.07 a month estimated with tax. Requires an AT&T unlimited plan; AT&T words it as 'as low as' and does not publish a rate for other plans.
- Cheapest once tax is counted: T-Mobile Watch Plan 2.0, about $12.60 a month.
Side by side
| Plan | Carrier | Type | Advertised | Lowest attainable | What you actually pay | Needs a phone line? | Data |
|---|---|---|---|---|---|---|---|
| Watch Plan 2.0 | T-Mobile | Standalone | $10/mo Conditional rate |
Same as shown | $12.60 to $12.80 estimated with tax |
Carrier does not say | unlimited high-speed |
| NumberSync smartwatch line | AT&T | Companion | $10.99/mo Conditional rate |
Same as shown | $13.85 to $14.07 estimated with tax |
Yes | Carrier does not say |
| Watch Plan Plus 2.0 | T-Mobile | Standalone | $15/mo Conditional rate |
Same as shown | $18.90 to $19.20 estimated with tax |
Carrier does not say | unlimited high-speed + intl |
T-Mobile Apple Watch plans
T-Mobile sells 2 Apple Watch lines: Watch Plan 2.0 and Watch Plan Plus 2.0. Advertised prices run $10 to $15 a month. Every one of them gives the watch a line of its own.
T-Mobile Watch Plan 2.0
$10/monthConditional rate
- Standalone
- Taxes extra
What you get
- Plan type
- Standalone
- Data
- unlimited high-speed
- Unlimited talk and text
- Yes
- Supported watches
- Apple, Samsung
What it costs and requires
- Standard rate
- Carrier does not say
- Lowest attainable rate
- $10. Requires AutoPay
- What you actually pay
- $12.60 to $12.80
estimated with tax - Taxes and fees
- Not included, charged on top
- Activation fee
- $35
- Requires a paired phone line
- Carrier does not say
- Requires AutoPay
- Yes
Source: T-Mobile smartwatch plans · Checked
T-Mobile Watch Plan Plus 2.0
$15/monthConditional rate
- Standalone
- Taxes extra
What you get
- Plan type
- Standalone
- Data
- unlimited high-speed + intl
- Unlimited talk and text
- Yes
- Supported watches
- Apple, Samsung
What it costs and requires
- Standard rate
- Carrier does not say
- Lowest attainable rate
- $15. Requires AutoPay
- What you actually pay
- $18.90 to $19.20
estimated with tax - Taxes and fees
- Not included, charged on top
- Activation fee
- $35
- Requires a paired phone line
- Carrier does not say
- Requires AutoPay
- Yes
Source: T-Mobile smartwatch plans · Checked
Adding or cancelling an Apple Watch line on T-Mobile
You need a GPS + Cellular Apple Watch. Open the Apple Watch app on your iPhone, go to Cellular and choose to set it up; that hands you to T-Mobile’s own activation, where you pick the watch line. Check the plan conditions above before you confirm, because the price you pay depends on them.
Removing the cellular plan from the watch in the Apple Watch app doesn’t stop the charge. To stop paying, cancel the watch line with T-Mobile itself.
AT&T Apple Watch plans
AT&T sells 1 Apple Watch line: NumberSync smartwatch line. Advertised prices run $10.99 a month. Every one of them shares your phone’s number, so you need a AT&T phone line first.
AT&T NumberSync smartwatch line
$10.99/monthConditional rate
- Companion
- Taxes extra
What you get
- Plan type
- Companion
- Data
- Carrier does not say
- Unlimited talk and text
- Yes
- Supported watches
- Apple, Samsung
What it costs and requires
- Standard rate
- Carrier does not say
- Lowest attainable rate
- $10.99. Requires an AT&T unlimited plan; AT&T words it as 'as low as' and does not publish a rate for other plans
- What you actually pay
- $13.85 to $14.07
estimated with tax - Taxes and fees
- Not included, charged on top
- Activation fee
- $35
- Requires a paired phone line
- Yes
Source: AT&T smartwatch plans · Checked
Adding or cancelling an Apple Watch line on AT&T
You need a GPS + Cellular Apple Watch. Open the Apple Watch app on your iPhone, go to Cellular and choose to set it up; that hands you to AT&T’s own activation, where you pick the watch line. Check the plan conditions above before you confirm, because the price you pay depends on them.
Removing the cellular plan from the watch in the Apple Watch app doesn’t stop the charge. To stop paying, cancel the watch line with AT&T itself.
The differences that matter
- Its own number. T-Mobile sells a standalone watch line, so the watch can work without a phone line on the same account. AT&T only sells lines that share a phone number.
- Conditions. AT&T NumberSync smartwatch line: $10.99/mo (Requires an AT&T unlimited plan; AT&T words it as 'as low as' and does not publish a rate for other plans). T-Mobile Watch Plan 2.0: $10/mo (Requires AutoPay). T-Mobile Watch Plan Plus 2.0: $15/mo (Requires AutoPay).
- Taxes. AT&T and T-Mobile add taxes and fees on top. That’s why the “What you actually pay” column matters more than the advertised one.
- The watch itself. Financing or a deal on the watch is separate from the monthly line. A cheap or free watch can come with a line you have to keep.
More carrier comparisons
- Verizon vs T-Mobile Apple Watch plans
- AT&T vs Verizon Apple Watch plans
- Verizon vs T-Mobile vs AT&T Apple Watch plans
- Every Apple Watch cellular plan compared, including smaller and prepaid carriers
How we compared
US Mobile wrote this comparison. Every price was read on the carrier’s own website between and , and each plan card links to that page. “What you actually pay” adds estimated taxes and any recurring carrier fee to the advertised price; where a carrier includes taxes, the price stands as is, and where a carrier doesn’t say, we leave the cost blank rather than guess. Prices change, so check the carrier’s page before you sign up.
Frequently Asked Questions
How do I cancel an Apple Watch plan on T-Mobile?
Cancel the watch line with T-Mobile itself, through your account or customer service. Removing the cellular plan from the watch in the Apple Watch app only takes it off the watch; it does not stop the monthly charge.
How do I add an Apple Watch to my T-Mobile plan?
You need a GPS + Cellular Apple Watch. In the Apple Watch app on your iPhone, open Cellular and choose to set it up, then pick the T-Mobile watch line. T-Mobile’s cheapest Apple Watch line is $10 a month for Watch Plan 2.0 (Requires AutoPay), plus taxes. Its other watch line: $15 a month for Watch Plan Plus 2.0 (Requires AutoPay), plus taxes. Prices are from T-Mobile’s own website.
How do I add an Apple Watch to my AT&T plan?
You need a GPS + Cellular Apple Watch. In the Apple Watch app on your iPhone, open Cellular and choose to set it up, then pick the AT&T watch line. AT&T’s cheapest Apple Watch line is $10.99 a month for NumberSync smartwatch line (Requires an AT&T unlimited plan; AT&T words it as ‘as low as’ and does not publish a rate for other plans), plus taxes. Prices are from AT&T’s own website.
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