Woman wearing a watch while holding up her smartphone outdoors
A phone in hand and a watch on the wrist. A cellular smartwatch lets you leave the phone behind for runs, errands and calls. Photo: Jamie Street on Unsplash.

Many smartwatches come in two versions that look identical: a GPS model and a GPS plus cellular (LTE) model. The cellular version costs more up front and adds a carrier plan, so the real question is simple. Do you spend enough time away from your phone for a cellular smartwatch to matter?

What the Two Versions Mean

  • GPS model: tracks location for workouts on its own, but needs your phone nearby, or known Wi-Fi, for calls, messages and data.
  • Cellular model: has its own mobile connection, so it can call, text, stream music and use apps with the phone left at home.

Both versions track runs with built-in GPS. The word “GPS” on the box is about location, not about internet access.

GPS vs LTE at a Glance

The table below compares daily life with each version.

Area GPS Model Cellular Model
Calls and texts without phone Only on known Wi-Fi, where supported Yes
Emergency SOS without phone Limited Yes, with service
Music streaming on a run Downloaded music only Streaming and downloads
Battery life Longer Shorter when LTE is in use
Ongoing cost None Monthly carrier plan

Quick answer: if your phone is almost always with you, the GPS model is enough. Choose cellular only if you regularly run, swim, or go out without your phone.

Who Benefits From Cellular

  • Runners and cyclists who want to leave the phone at home but stay reachable.
  • Swimmers and beachgoers who do not want to carry a phone near water.
  • Older adults and their families who value fall detection and emergency calls anywhere.
  • Kids or family members using family setup features, which often need a cellular watch.

How Cellular Plans Work

  1. Check that your carrier supports your watch model. Major US carriers support Apple Watch, Galaxy Watch and Pixel Watch.
  2. Add the watch to your plan, usually during setup in the watch’s phone app.
  3. The watch typically shares your phone number, so calls and texts look the same to others.
  4. Plan for a monthly fee for as long as you keep cellular active.

You can also buy a cellular model and skip the plan, then add it later if your routine changes.

Battery Trade-offs

Cellular uses the most power when the phone is out of range and signal is weak. On days with your phone nearby, the watch uses Bluetooth and battery life is close to the GPS model. Our guide on Pixel Watch battery drain covers LTE settings that save power.

Final Thoughts

A cellular smartwatch is worth it when you often go out without your phone, especially for workouts, swims or safety. For everyone else, the GPS model does the same tracking with better battery and no monthly bill.

Set your overall budget with our guide on how much to spend on a smartwatch, check which watches work with your phone, and see the Apple Watch Ultra 3 review for a model that comes with cellular built in.

FAQs

Does a GPS smartwatch need a phone to track runs?

No, built-in GPS tracks routes on its own. The phone is only needed for calls, texts and data.

Can a cellular smartwatch use my phone number?

Yes, most carriers let the watch share your number. Check your carrier’s watch plan details.

Can I use a cellular watch without a plan?

Yes, it works like a GPS model without a plan. You can add service later.

Does LTE drain smartwatch battery?

Yes, especially in weak signal areas away from your phone. Battery is similar when the phone is nearby.