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A T‑Mobile SIM card connects your device to the T‑Mobile network. Insert this SIM into your new phone and start enjoying all the benefits of our unlimited plans.
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The SIM stores your account information and connects your device to the T‑Mobile network.
Shop for SIM cards for as low as $0 today.
The SIM stores your account information and connects your device to the T‑Mobile network.
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Good news! Your current title plan will transfer to your new device.
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Good news! Your new phone will be protected. Your title plan will transfer to your new device.
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Want to get it sooner?
Made for kids and your peace of mind Made for kids and your peace of mind
Is your child ready for their first watch? Galaxy Watch for Kids to the rescue. It’s loaded with features that give parents valuable ways to help guide their kid safely into the digital world. Your kid’s first watch will be a fun experience for both you and them.
Parent and child must have a Samsung and Google Account with Family Link; parental consent required for children under 13 years old. Requires initial pairing with an eligible Android Smartphone and separate qualifying wireless plan. Support may be available only in certain areas.
Sleep smarter. Live better. Sleep smarter. Live better.
Energize your days with a great night’s rest using Advanced Sleep Coaching1—improved with even more ways to keep your nights on track. Plus, Bedtime Guidance2 helps you find your optimal bedtime so you can wake up feeling refreshed.
1Galaxy AI features track data and require compatible Samsung Galaxy phone, Samsung Health app and Samsung account. 2Bedtime Guidance: Must wear watch for 3 consecutive nights and set optimal wake-up time in the Samsung Health app.
Your run, your coach Your run, your coach
Step up your running routine with a Running Coach1 that analyzes your performance and gives you real-time feedback. Training for an event? Try specific programs built for 5Ks, marathons and more.
1Available for outdoor running only; requires at least 12 minutes of running with GPS on and initial setup. Galaxy AI features track data and require compatible Samsung Galaxy phone, Samsung Health app and Samsung account.
New design. Lightweight feel. New design. Lightweight feel.
Maximize your days with a minimalist design. The sleek, thinner-than-ever silhouette makes Galaxy Watch8 look as good as it functions. With a snug fit and sporty style, it gives you readings without getting in your way.
A personal assistant, right on your wrist A personal assistant, right on your wrist
Your Watch just became your personal assistant.1 Stay one step ahead of your day with a watch that helps you navigate your tasks and to-do lists. Need to send a text while on a run? No problem. Raise your wrist and speak your command and your Watch does the rest for you.
1Gemini mobile app available on select devices, languages, and countries. Requires compatible Wear OS watch to be connected to a compatible device. Check responses for accuracy. Internet connection and set up may be required. Features may differ depending on subscription and account. Results for illustrative purposes and may vary. Google and Gemini are trademarks of Google LLC.
See what you need, at a glance See what you need, at a glance
Get clear and concise updates throughout your day with the improved interface on Galaxy Watch8. Now it’s easier than ever to see sports scores, breaking news, weather and more at a glance,1 without getting overwhelmed with less important notifications.
1Must be signed into your Samsung and Google accounts and be connected to the internet directly (by Wi-Fi or LTE model) or via a compatible Samsung Galaxy AI phone.
Two devices teaming up for your health tracking Two devices teaming up for your health tracking
With Galaxy Watch8 on your wrist and your Galaxy Z Flip7 in your pocket, you’ve got round-the-clock wellness tracking at a glance. From sleep quality to daily movement, it’s all right there – quick, easy and always within arm’s reach.
Galaxy AI features track data and require compatible Samsung Galaxy phone (sold separately), Samsung Health app and Samsung account.
Key features
438 x 438 pixels
1.34'', 327ppi, Sapphire Crystal Glass Display
2.7 Hours Talk Time
2.7 Days Standby Time
Other features
- Advanced Sleep Coaching
- Running Coach
- New Design
- Personal AI Assistant
- Improved UX
- Improved Battery Life
- Energy Score
Galaxy Watch8 is built for those who never settle when it comes to self-improvement. With a sporty yet sleek design, it packs a serious punch of enhanced performance, longer battery life and smart health tracking to keep you locked in to your health and wellness goals, wherever they may take you.
Your Watch8 works around the clock because a healthy lifestyle starts with healthy sleep. Advanced Sleep Tracking doesn’t just log hours, but it also takes a closer look at everything that happened while you snoozed. Wake up feeling lethargic? Get a full report on your sleep behavior, environment and disruptions, such as snoring.1 And when it’s time to get back on your feet for a new day and a new workout, you’re equipped with the insights you need to stay motivated with Energy Score. Need to multitask during your workout? Simply raise your wrist and speak naturally to send a text to meet up with a friend later, set a timer for your next mile or pull up your past run times.2
Watch8 is powerful and features an improved battery3 built to keep up with your longest bike rides without weighing you down. Thanks to a thinner, lighter body and dynamic strap system that molds to your wrist, you’ll almost forget your Watch is there as it tracks even the most intense workouts. Plus, the bright screen is visible even when you have to hit the trail in full sun.
Galaxy Watch8 is more than a watch — it’s a health coach and tracker that fits your wrist and your lifestyle.
1Phone must be within two feet of user with snore detection enabled through compatible Samsung Health app.
2Must have gesture settings enabled, be signed into your Samsung and Google accounts, and be connected to the internet directly (byWi-Fi or LTE model) or via a compatible Samsung Galaxy AI phone. 3Based on typical use; results may vary.
Galaxy Watch8 40MM Quick Facts
Your Watch8 works around the clock because a healthy lifestyle starts with healthy sleep. Advanced Sleep Tracking doesn’t just log hours, but it also takes a closer look at everything that happened while you snoozed. Wake up feeling lethargic? Get a full report on your sleep behavior, environment and disruptions, such as snoring.1 And when it’s time to get back on your feet for a new day and a new workout, you’re equipped with the insights you need to stay motivated with Energy Score. Need to multitask during your workout? Simply raise your wrist and speak naturally to send a text to meet up with a friend later, set a timer for your next mile or pull up your past run times.2
Watch8 is powerful and features an improved battery3 built to keep up with your longest bike rides without weighing you down. Thanks to a thinner, lighter body and dynamic strap system that molds to your wrist, you’ll almost forget your Watch is there as it tracks even the most intense workouts. Plus, the bright screen is visible even when you have to hit the trail in full sun.
Galaxy Watch8 is more than a watch — it’s a health coach and tracker that fits your wrist and your lifestyle.
1Phone must be within two feet of user with snore detection enabled through compatible Samsung Health app.
2Must have gesture settings enabled, be signed into your Samsung and Google accounts, and be connected to the internet directly (by
Galaxy Watch8 40MM Quick Facts
- When was the Samsung Galaxy Watch8 40MM be released? The Galaxy Watch8 40MM was released on July 25th, 2025.
- What colors are available for the Samsung Galaxy Watch8 40MM? The Galaxy Watch8 40MM is available in two colors: Silver or Graphite.*
- What storage size options are available for the Galaxy Watch8 40MM? The Galaxy Watch8 40MM has one memory storage size: 32GB.
What’s in the box
- Samsung Galaxy Watch8 40MM
- Charging Dock
- Quick Start Guide
- Terms and Conditions
Additional spec details
Battery Description
325 mAh
Ports
Wireless Charging
Connectivity
Bluetooth 5.3, Wi-Fi 2.4GHz and 5GHz, Dual GPS, NFC, LTE
Processor
Exynos W1000
Operating System
Wear OS
Ram
2 GB
Maximum Expandable Memory
0 GB
Wireless Network Technology Generations
4G LTE
Supported Email Platforms
POP3, IMAP4, SMTP, Microsoft® Exchange, AOL, AIM, Yahoo!® Mail, GMail
WEA Capable
true
Mobile Hotspot Capable
false
Frequency
UMTS: Band I (2100), Band II (1900), Band IV (1700/2100), Band V (850), Band VIII (900); LTE: 1, 2, 3, 4, 5, 7, 8, 12, 13, 20, 25, 26, 28, 66, 71
Weight
1.05 Ounces
Length
0.33 Inches
Height
1.68 Inches
Width
1.59 Inches
Loading reviews
Key features
438 x 438 pixels
1.34'', 327ppi, Sapphire Crystal Glass Display
2.7 Hours Talk Time
2.7 Days Standby Time
Other features
- Advanced Sleep Coaching
- Running Coach
- New Design
- Personal AI Assistant
- Improved UX
- Improved Battery Life
- Energy Score
Galaxy Watch8 is built for those who never settle when it comes to self-improvement. With a sporty yet sleek design, it packs a serious punch of enhanced performance, longer battery life and smart health tracking to keep you locked in to your health and wellness goals, wherever they may take you.
Your Watch8 works around the clock because a healthy lifestyle starts with healthy sleep. Advanced Sleep Tracking doesn’t just log hours, but it also takes a closer look at everything that happened while you snoozed. Wake up feeling lethargic? Get a full report on your sleep behavior, environment and disruptions, such as snoring.1 And when it’s time to get back on your feet for a new day and a new workout, you’re equipped with the insights you need to stay motivated with Energy Score. Need to multitask during your workout? Simply raise your wrist and speak naturally to send a text to meet up with a friend later, set a timer for your next mile or pull up your past run times.2
Watch8 is powerful and features an improved battery3 built to keep up with your longest bike rides without weighing you down. Thanks to a thinner, lighter body and dynamic strap system that molds to your wrist, you’ll almost forget your Watch is there as it tracks even the most intense workouts. Plus, the bright screen is visible even when you have to hit the trail in full sun.
Galaxy Watch8 is more than a watch — it’s a health coach and tracker that fits your wrist and your lifestyle.
1Phone must be within two feet of user with snore detection enabled through compatible Samsung Health app.
2Must have gesture settings enabled, be signed into your Samsung and Google accounts, and be connected to the internet directly (byWi-Fi or LTE model) or via a compatible Samsung Galaxy AI phone. 3Based on typical use; results may vary.
Galaxy Watch8 40MM Quick Facts
Your Watch8 works around the clock because a healthy lifestyle starts with healthy sleep. Advanced Sleep Tracking doesn’t just log hours, but it also takes a closer look at everything that happened while you snoozed. Wake up feeling lethargic? Get a full report on your sleep behavior, environment and disruptions, such as snoring.1 And when it’s time to get back on your feet for a new day and a new workout, you’re equipped with the insights you need to stay motivated with Energy Score. Need to multitask during your workout? Simply raise your wrist and speak naturally to send a text to meet up with a friend later, set a timer for your next mile or pull up your past run times.2
Watch8 is powerful and features an improved battery3 built to keep up with your longest bike rides without weighing you down. Thanks to a thinner, lighter body and dynamic strap system that molds to your wrist, you’ll almost forget your Watch is there as it tracks even the most intense workouts. Plus, the bright screen is visible even when you have to hit the trail in full sun.
Galaxy Watch8 is more than a watch — it’s a health coach and tracker that fits your wrist and your lifestyle.
1Phone must be within two feet of user with snore detection enabled through compatible Samsung Health app.
2Must have gesture settings enabled, be signed into your Samsung and Google accounts, and be connected to the internet directly (by
Galaxy Watch8 40MM Quick Facts
- When was the Samsung Galaxy Watch8 40MM be released? The Galaxy Watch8 40MM was released on July 25th, 2025.
- What colors are available for the Samsung Galaxy Watch8 40MM? The Galaxy Watch8 40MM is available in two colors: Silver or Graphite.*
- What storage size options are available for the Galaxy Watch8 40MM? The Galaxy Watch8 40MM has one memory storage size: 32GB.
What’s in the box
- Samsung Galaxy Watch8 40MM
- Charging Dock
- Quick Start Guide
- Terms and Conditions
Additional spec details
Battery Description
325 mAh
Ports
Wireless Charging
Connectivity
Bluetooth 5.3, Wi-Fi 2.4GHz and 5GHz, Dual GPS, NFC, LTE
Processor
Exynos W1000
Operating System
Wear OS
Ram
2 GB
Maximum Expandable Memory
0 GB
Wireless Network Technology Generations
4G LTE
Supported Email Platforms
POP3, IMAP4, SMTP, Microsoft® Exchange, AOL, AIM, Yahoo!® Mail, GMail
WEA Capable
true
Mobile Hotspot Capable
false
Frequency
UMTS: Band I (2100), Band II (1900), Band IV (1700/2100), Band V (850), Band VIII (900); LTE: 1, 2, 3, 4, 5, 7, 8, 12, 13, 20, 25, 26, 28, 66, 71
Weight
1.05 Ounces
Length
0.33 Inches
Height
1.68 Inches
Width
1.59 Inches
