Samsung
Samsung Galaxy S21 Ultra 5G G998B Dual SIM 128GB 12GB RAM GSM Unlocked - Silver
Samsung Galaxy S21 Ultra 5G G998B Dual SIM 128GB 12GB RAM GSM Unlocked - Silver
SKU: SKU:SM-G998B-5G-12-128-SL
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Samsung Galaxy S21 Ultra 5G
8K Video. 120Hz Display. Silver Edition.
A true flagship experience with powerful performance, pro-grade camera, and premium design.
Cinematic 8K Video + Pro Camera
Capture cinematic 8K video and extract stunning high-resolution photos from your footage.
Contour-Cut Camera Design
A bold, integrated camera design that defines the premium Galaxy look.
6.8” Dynamic AMOLED 120Hz Display
Ultra-smooth visuals with Quad HD+ resolution and vibrant color accuracy.
Exynos 2100 Processor
Powerful performance for multitasking, gaming, and demanding applications.
5000mAh All-Day Battery
Stay powered throughout your day with long-lasting battery life.
128GB Storage + 12GB RAM
Smooth performance and plenty of storage for apps, photos, and videos.
Premium Build
Durable Gorilla Glass Victus with a sleek, modern silver finish.
Ultrasonic Fingerprint Sensor
Fast and secure unlocking with under-display fingerprint technology.
5G Connectivity
Experience ultra-fast speeds for streaming, gaming, and downloads.
Factory Unlocked (GSM Only)
Works with GSM carriers like AT&T and T-Mobile. Not compatible with CDMA networks.
Important Information
- International Version – No Manufacturer Warranty
- Supports GSM networks only
- Not compatible with Verizon, Sprint, Boost, or other CDMA carriers
- Please confirm carrier compatibility before purchase
Buy Samsung Galaxy S21 Ultra Today
Available now at MyWorldPhone.com
Versions: SM-G998B, SM-G998B/DS (International); SM-G998U (USA); SM-G998U1 (USA unlocked); SM-G998W (Canada); SM-G998N (Korea); SM-G9980 (China)
| NETWORK | Technology | GSM / CDMA / HSPA / EVDO / LTE / 5G |
|---|---|---|
| 2G bands | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 (Dual SIM model only) | |
| CDMA 800 / 1900 & TD-SCDMA | ||
| 3G bands | HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100 | |
| CDMA2000 1xEV-DO | ||
| 4G bands | 1, 2, 3, 4, 5, 7, 8, 12, 13, 14, 18, 19, 20, 25, 26, 28, 30, 38, 39, 40, 41, 46, 48, 66, 71 - SM-G998U1 | |
| 1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 18, 19, 20, 25, 26, 28, 32, 38, 39, 40, 41, 66 - SM-G998B | ||
| 5G bands | 2, 5, 25, 41, 66, 71, 260, 261 SA/NSA/Sub6/mmWave - SM-G998U1 | |
| 1, 3, 5, 7, 8, 20, 28, 38, 40, 41, 66, 77, 78 SA/NSA/Sub6 - SM-G998B | ||
| Speed | HSPA 42.2/5.76 Mbps, LTE-A (7CA) Cat20 2000/200 Mbps; 5G (5+ Gbps DL) |
| LAUNCH | Announced | 2021, January 14 |
|---|---|---|
| Status | Available. Released 2021, January 29 |
| BODY | Dimensions | 165.1 x 75.6 x 8.9 mm (6.5 x 2.98 x 0.35 in) |
|---|---|---|
| Weight | 227 g (Sub6), 229 g (mmWave) (8.01 oz) | |
| Build | Glass front (Gorilla Glass Victus), glass back (Gorilla Glass Victus), aluminum frame | |
| SIM | Single SIM (Nano-SIM) or Dual SIM (2 Nano-SIMs + eSIM, dual stand-by) | |
| IP68 dust/water resistant (up to 1.5m for 30 mins) Stylus support |
| DISPLAY | Type | Dynamic AMOLED 2X, 120Hz, HDR10+, 1500 nits (peak) |
|---|---|---|
| Size | 6.8 inches, 112.1 cm2 (~89.8% screen-to-body ratio) | |
| Resolution | 1440 x 3200 pixels, 20:9 ratio (~515 ppi density) | |
| Protection | Corning Gorilla Glass Victus | |
| Always-on display |
| PLATFORM | OS | Android 11, upgradable to Android 12, One UI 4.1 |
|---|---|---|
| Chipset | Exynos 2100 (5 nm) - International Qualcomm SM8350 Snapdragon 888 5G (5 nm) - USA/China |
|
| CPU | Octa-core (1x2.9 GHz Cortex-X1 & 3x2.80 GHz Cortex-A78 & 4x2.2 GHz Cortex-A55) - International Octa-core (1x2.84 GHz Cortex-X1 & 3x2.42 GHz Cortex-A78 & 4x1.80 GHz Cortex-A55) - USA/China |
|
| GPU | Mali-G78 MP14 - International Adreno 660 - USA/China |
| MEMORY | Card slot | No |
|---|---|---|
| Internal | 128GB 12GB RAM, 256GB 12GB RAM, 256GB 16GB RAM, 512GB 12GB RAM, 512GB 16GB RAM | |
| UFS 3.1 |
| MAIN CAMERA | Quad | 108 MP, f/1.8, 24mm (wide), 1/1.33", 0.8µm, PDAF, Laser AF, OIS 10 MP, f/4.9, 240mm (periscope telephoto), 1/3.24", 1.22µm, dual pixel PDAF, OIS, 10x optical zoom 10 MP, f/2.4, 72mm (telephoto), 1/3.24", 1.22µm, dual pixel PDAF, OIS, 3x optical zoom 12 MP, f/2.2, 13mm (ultrawide), 1/2.55", 1.4µm, dual pixel PDAF, Super Steady video |
|---|---|---|
| Features | LED flash, auto-HDR, panorama | |
| Video | 8K@24fps, 4K@30/60fps, 1080p@30/60/240fps, 720p@960fps, HDR10+, stereo sound rec., gyro-EIS |
| SELFIE CAMERA | Single | 40 MP, f/2.2, 26mm (wide), 1/2.8", 0.7µm, PDAF |
|---|---|---|
| Features | Dual video call, Auto-HDR | |
| Video | 4K@30/60fps, 1080p@30fps |
| SOUND | Loudspeaker | Yes, with stereo speakers |
|---|---|---|
| 3.5mm jack | No | |
| 32-bit/384kHz audio Tuned by AKG |
| COMMS | WLAN | Wi-Fi 802.11 a/b/g/n/ac/6e, dual-band, Wi-Fi Direct, hotspot |
|---|---|---|
| Bluetooth | 5.2, A2DP, LE | |
| GPS | Yes, with A-GPS, GLONASS, BDS, GALILEO | |
| NFC | Yes | |
| Radio | FM radio (Snapdragon model only; market/operator dependent) | |
| USB | USB Type-C 3.2, USB On-The-Go |
| FEATURES | Sensors | Fingerprint (under display, ultrasonic), accelerometer, gyro, proximity, compass, barometer |
|---|---|---|
| Samsung DeX, Samsung Wireless DeX (desktop experience support) Bixby natural language commands and dictation Samsung Pay (Visa, MasterCard certified) Ultra Wideband (UWB) support |
| BATTERY | Type | Li-Ion 5000 mAh, non-removable |
|---|---|---|
| Charging | Fast charging 25W USB Power Delivery 3.0 Fast Qi/PMA wireless charging 15W Reverse wireless charging 4.5W |
| MISC | Colors | Phantom Black, Phantom Silver, Phantom Titanium, Phantom Navy, Phantom Brown, Navy |
|---|---|---|
| Models | SM-G998B, SM-G998B/DS, SM-G998U, SM-G998U1, SM-G998W, SM-G998N, SM-G9980 | |
| SAR | 0.77 W/kg (head) 1.02 W/kg (body) | |
| SAR EU | 0.71 W/kg (head) 1.58 W/kg (body) |
| TESTS | Performance | AnTuTu: 657150 (v8) GeekBench: 3518 (v5.1) GFXBench: 33fps (ES 3.1 onscreen) |
|---|---|---|
| Display | Contrast ratio: Infinite (nominal) | |
| Camera | Photo / Video | |
| Loudspeaker | -25.5 LUFS (Very good) | |
| Battery life |
Endurance rating 114h
|
| UPC/EAN | 6438158741355 |
|---|
| Warranty | No Warranty |
|---|
| 1pcs | Samsung Galaxy S21 Ultra SM-G998B |
| 1pcs | Battery. |
| 1pcs | Home Charger. |
| 1pcs | Headphone. |
| 1pcs | Data Cable. |
| 1pcs | User Manual. |
1. Which exact Galaxy S21 Ultra is this?
This is the international Samsung Galaxy S21 Ultra 5G SM-G998B/DS, with 12GB RAM, 128GB storage and Phantom Silver finish.
2. Is 12GB RAM + 128GB storage official?
Yes. Samsung officially offered 12GB RAM with 128GB or 256GB storage, while the 512GB version used 16GB RAM.
3. What is the official color name?
Phantom Silver. Your current title shortening it to “Silver” is understandable but less manufacturer-accurate.
4. Is Phantom Silver an official S21 Ultra color?
Yes. Samsung officially lists Phantom Silver for the Galaxy S21 Ultra.
5. What type of RAM does it use?
12GB LPDDR5.
6. What storage technology is used?
UFS 3.1. Your existing UFS 3.1 specification is correct.
7. Does it have a microSD slot?
No. Samsung removed microSD expansion from the Galaxy S21 series.
8. Is all 128GB available to the user?
No. The operating system, Samsung software and system partitions consume part of the advertised storage. Samsung explicitly notes that usable storage is lower.
9. Was there a 256GB/16GB official S21 Ultra?
Not according to Samsung’s official global configuration table. 128GB/12GB, 256GB/12GB and 512GB/16GB are the manufacturer-supported combinations.
10. Was there a 512GB/12GB official configuration?
Not in Samsung’s primary official S21 Ultra specification. The 512GB version was paired with 16GB RAM.
Exynos 2100 platform
11. Which chipset does this exact SM-G998B use?
Samsung Exynos 2100. This is critical: SM-G998B is the international Exynos version.
12. Does SM-G998B use Snapdragon 888?
No. Snapdragon 888 applies to other regional S21 Ultra variants. Your exact international SM-G998B uses Exynos 2100.
13. What manufacturing process does Exynos 2100 use?
5nm.
14. What is the CPU configuration?
For the Exynos international model: 1× Cortex-X1 up to 2.9GHz + 3× Cortex-A78 up to 2.8GHz + 4× Cortex-A55 up to 2.2GHz. Samsung’s global materials identify the Exynos-class processor with those maximum clock groups.
15. How many CPU cores does it have?
Eight.
16. What is the maximum CPU frequency?
Up to 2.9GHz for the Exynos 2100 version.
17. Which GPU does the international model use?
Mali-G78 MP14.
18. Should Adreno 660 appear on this page?
No. Adreno 660 belongs to Snapdragon 888 variants, not your SM-G998B. Your page currently mixes both regional platforms.
19. Should Snapdragon 888 appear anywhere in the exact-SKU specification?
I would remove it entirely from this SKU page unless you create a clearly separated “other regional variants” section.
20. Is SM-G998B a 64-bit device?
Yes. Samsung describes the S21 Ultra’s processor platform as a 5nm 64-bit octa-core processor.
Display
21. How large is the display?
6.8 inches measured as the full rectangle.
22. What display technology is used?
Dynamic AMOLED 2X.
23. Is the screen flat?
No. Samsung officially describes the S21 Ultra as having an Edge QHD+ display.
24. What is the resolution?
3200 × 1440 Quad HD+.
25. What is the pixel density?
Approximately 515 PPI.
26. What aspect ratio does it use?
Approximately 20:9.
27. What refresh rate does it support?
Adaptive 10Hz–120Hz.
28. Can 120Hz be used with QHD+?
Yes. The S21 Ultra was designed to combine its adaptive 120Hz refresh with its high-resolution panel.
29. What is peak brightness?
Samsung advertises up to 1500 nits peak brightness.
30. Does it support HDR10+?
Yes. The display is HDR10+ certified.
31. What protects the display?
Corning Gorilla Glass Victus.
32. Does the rear also use Gorilla Glass Victus?
Yes. Samsung’s S21 Ultra materials specify Victus glass on the front and rear with a metal frame.
33. Does it support Always-On Display?
Yes.
34. Does it support Eye Comfort Shield?
Yes. Samsung specifically lists Eye Comfort Shield with the adaptive display.
35. Does the display support S Pen input?
Yes. The S21 Ultra was the first Galaxy S-series model to support S Pen.
S Pen & security
36. Is an S Pen built into the phone?
No. Unlike a Galaxy Note or later S Ultra models, the S21 Ultra has no built-in S Pen slot.
37. Is an S Pen included in the box?
No. It was an optional accessory.
38. What fingerprint sensor does it use?
A second-generation ultrasonic under-display fingerprint sensor.
39. Is there a fingerprint sensor on the rear panel?
No. This matters because two of your current ALT tags incorrectly describe a fingerprint sensor on the back.
40. Does it support face recognition?
Yes. Samsung lists both face recognition and ultrasonic fingerprint authentication.
Rear camera system
41. How many rear cameras are there?
Four actual rear cameras. So “quad-camera” wording itself is correct.
42. What is the main rear camera?
108MP wide-angle camera.
43. What is the main-camera aperture?
f/1.8.
44. What is the main-camera pixel size?
0.8µm native pixel size.
45. Does the main camera have OIS?
Yes.
46. Does the main camera use autofocus?
Yes, with phase-detection autofocus plus a separate laser autofocus sensor.
47. What is the ultrawide camera?
12MP | f/2.2 | 120° FOV | Dual Pixel AF | 1.4µm.
48. Does the ultrawide autofocus?
Yes. Samsung lists Dual Pixel AF.
49. Can the ultrawide be used for close-up photography?
Samsung marketed close focusing using the autofocusing ultrawide camera.
50. Does the S21 Ultra have one or two telephoto cameras?
Two.
Telephoto & zoom
51. What is the first telephoto camera?
10MP | f/2.4 | 3× optical zoom | Dual Pixel AF | OIS.
52. What is the second telephoto camera?
10MP periscope | f/4.9 | 10× optical zoom | Dual Pixel AF | OIS.
53. Is the 10× zoom optical?
Yes. The periscope camera provides genuine 10× optical zoom.
54. Is the 3× zoom optical?
Yes.
55. What is Space Zoom?
Samsung’s 100× Space Zoom combines the 10× optical system with digital/super-resolution processing.
56. Is 100× fully optical zoom?
No. Samsung explicitly says the 100× figure includes digital/super-resolution zoom.
57. Do both telephoto cameras have OIS?
Yes. Samsung’s official camera table specifies OIS for both.
58. Does the phone use a laser autofocus sensor?
Yes.
59. Is the laser autofocus sensor a fifth camera?
No. It assists focusing; it is not another imaging camera.
60. Is “quad camera array” accurate in image ALT text?
Yes. Quad camera is correct. The incorrect portion is when your ALT additionally says there is a rear fingerprint sensor.
Front camera & video
61. What is the selfie-camera resolution?
40MP. Your top buying-area field is correct.
62. What is the front-camera aperture?
f/2.2.
63. Does the front camera autofocus?
Yes. Samsung lists phase-detection AF.
64. What is the front-camera field of view?
Approximately 80°.
65. What is maximum rear video resolution?
8K at 24fps.
66. Does it record 4K60?
Yes.
67. Can every major camera shoot 4K60?
Samsung’s official regional launch materials highlight 4K60 recording across all cameras.
68. Does it support HDR video?
Yes, including HDR10+ video modes.
69. Does it support Director’s View?
Yes. Samsung marketed Director’s View as part of the S21 camera experience.
70. Does it support 8K Video Snap?
Yes. You can extract high-resolution stills from 8K footage, one of Samsung’s key S21 Ultra camera features.
Battery & charging
71. What is the battery capacity?
5000mAh typical, with Samsung listing 4855mAh rated/minimum capacity.
72. Is the battery removable?
No.
73. What is maximum wired charging?
25W Super Fast Charging.
74. Does it support USB Power Delivery?
Yes, Samsung specifies USB PD 3.0 with PPS support.
75. Does it support AFC?
Yes.
76. Does it support Quick Charge compatibility?
Samsung lists QC2.0 compatibility in its official global material.
77. Does it support wireless charging?
Yes.
78. What is maximum wireless charging?
15W Fast Wireless Charging.
79. Does it support reverse wireless charging?
Yes, through Wireless PowerShare.
80. Should the 15W wireless charging pad remain on your product page?
Yes. Unlike many recent products we removed it from, this accessory is a very good match for the S21 Ultra’s official 15W wireless-charging capability.
SIM & network
81. Does SM-G998B support Dual SIM?
Yes. Samsung lists it as a Dual-SIM model.
82. Does it support eSIM?
Yes. Samsung lists Nano-SIM and embedded-SIM support, with SIM configuration dependent on region/software.
83. Can the page simply say “2 Nano-SIMs + eSIM”?
That can sound like three active lines simultaneously. Better wording is:
Dual SIM — SIM 1 + SIM 2 or supported physical/eSIM combination depending on software and regional configuration.
84. Does SM-G998B support mmWave 5G?
The exact SM-G998B international model is a Sub-6 5G model. Your current page’s U.S. mmWave information belongs to SM-G998U1 and should not be mixed into this SKU.
85. What 5G bands does Samsung list for SM-G998B-class international hardware?
Samsung Gulf lists n1/n3/n5/n7/n8/n20/n28/n66 plus n38/n40/n41/n77/n78 for the G998B family.
86. Does SM-G998B support CDMA2000/EVDO?
Samsung’s exact G998B bearer table lists GSM/WCDMA/LTE/5G, not CDMA2000/EVDO. The CDMA entries on your current page come from other regional variants and should be removed.
87. Is it accurate to market it as “GSM only”?
No. That wording is outdated. It supports modern LTE and 5G networks; activation depends on bands, IMEI eligibility, VoLTE/IMS provisioning and carrier policy.
88. Does factory unlocked guarantee U.S. carrier activation?
No. Even with supported LTE/5G bands, the carrier can restrict activation based on IMEI, certification or provisioning.
89. Should Verizon be categorically called incompatible because it was historically CDMA?
No. That old GSM-vs-CDMA explanation is no longer technically appropriate for modern LTE/5G service.
90. What is the safest compatibility wording?
Use a modern bands + IMEI + VoLTE/IMS + carrier policy disclaimer rather than GSM/CDMA terminology.
Connectivity, audio & software
91. Does it support Wi-Fi 6E?
Yes. Samsung specifically lists Wi-Fi 6E for Galaxy S21 Ultra.
92. What Bluetooth version does it use?
Bluetooth 5.2.
93. Does it support NFC?
Yes.
94. Does it support Ultra Wideband?
Yes. UWB is supported on the S21 Ultra.
95. What USB connection does it use?
USB Type-C, USB 3.2 Gen 1.
96. Does it support wired display output?
Yes. Samsung officially supports DisplayPort over USB-C, including up to 4K UHD output, and Samsung DeX.
97. Does it have stereo speakers?
Yes. Samsung also advertises Dolby Atmos support.
98. Does it have a 3.5mm headphone jack?
No.
99. What software did it launch with?
It launched with Android 11 / One UI 3.x. Samsung later included the S21 Ultra in its four-generation OS-upgrade policy.
100. What is the latest major OS generation officially supported?
Samsung’s official update pages include Galaxy S21 Ultra in the One UI 7 / Android 15 rollout. Samsung’s current One UI 8 eligibility list does not include the original S21 Ultra, so Android 15 / One UI 7 is its final major Android-generation upgrade under the four-generation policy. Availability can still vary by region and firmware.
