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Smartphone comparison

Samsung Galaxy S23 Ultra Refurbished vs Xiaomi 15T

Compare cameras, battery, screen and everyday features.

Compared products
01Selected
Samsung Galaxy S23 Ultra Refurbished

Samsung Galaxy S23 Ultra Refurbished

  • 234 g.
  • About 6.8 inch screen.
  • Qualcomm SM8550-AC Snapdragon 8 Gen 2 (4 nm) processor.
  • Storage: UFS 4.0.
  • 5,000 mAh battery capacity.
KSh 70,000In Stock
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02
Xiaomi 15T

Xiaomi 15T

  • 194 g.
  • About 120 Hz display refresh rate.
  • About 6.83 inch screen.
  • Mediatek Dimensity 8400 Ultra (4 nm) processor.
  • 12 GB RAM in this version.
KSh 71,500In Stock
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Samsung Galaxy S25 FEKSh 71,000
Samsung Galaxy S24 5GKSh 65,000
Vivo V70 5GKSh 72,700
Google Pixel 10aKSh 71,000
Oppo Reno15 5GKSh 67,700
Xiaomi 17T 5GKSh 74,000
OnePlus 13s 5GKSh 74,000
2 of 4 products

Our quick verdict

The Xiaomi 15T has a bigger battery (5,500 mAh), charges faster (67 W) and runs newer Android 15, while the Samsung Galaxy S23 Ultra Refurbished has a sharper screen, a higher-resolution main camera (200 MP), 8K video recording and a sturdier aluminium build with a glass back.

Weight

Samsung Galaxy S23 Ultra Refurbished
234 g
Xiaomi 15T
194 g

Display

Samsung Galaxy S23 Ultra Refurbished
About 6.8 inch screen
Xiaomi 15T
About 6.83 inch screen

Performance

Samsung Galaxy S23 Ultra Refurbished
Qualcomm SM8550-AC Snapdragon 8 Gen 2 (4 nm) processor
Xiaomi 15T
Mediatek Dimensity 8400 Ultra (4 nm) processor

Storage

Samsung Galaxy S23 Ultra Refurbished
UFS 4.0
Xiaomi 15T
UFS 4.1

Battery capacity

Samsung Galaxy S23 Ultra Refurbished
5,000 mAh battery capacity
Xiaomi 15T
5,500 mAh battery capacity

Key differences

The main differences to help you choose.

Samsung Galaxy S23 Ultra Refurbished

  • Sharper screen: 500 ppi (vs 447 ppi).
  • Higher-resolution main camera: 200 MP (vs 50 MP).
  • Aluminium frame and glass back (vs plastic frame).
  • 8K video recording (vs 4K).
  • 15 W wireless charging.
  • 4.5 W reverse charging for earbuds or another phone.

Xiaomi 15T

  • Bigger battery: 5,500 mAh (vs 5,000 mAh).
  • Faster rated wired charging: 67 W (vs 45 W).
  • Newer Android 15 (vs Android 13).
  • Brighter display: up to 3,200 nits (vs 1,750).
  • Newer Bluetooth 6.0 (vs 5.3).
  • Higher-resolution selfie camera: 32 MP (vs 12 MP).

What matters most to you?

Choose any priorities

How each product answers the questions buyers ask most. Tick a topic to add it, untick one to hide it.

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6 priorities selected.
How each product answers the selected priorities
PrioritySamsung Galaxy S23 Ultra RefurbishedXiaomi 15T
Display6.8-inch OLED display, 120 Hz, 500 ppi6.83-inch OLED display, 120 Hz, 447 ppi
Camera200 MP main camera with OIS, plus a 3x telephoto camera50 MP main camera with OIS, plus a 2x telephoto camera
PerformanceQualcomm Snapdragon 8 Gen 2 processorMediatek Dimensity 8400 Ultra processor
MemoryUp to 12 GB RAM12 GB RAM
Battery capacity5,000 mAh battery5,500 mAh battery
Charging45 W wired, 15 W wireless charging67 W wired charging

Detailed comparison

Explore the full specifications, section by section.

General

General specifications comparison
SpecificationSamsung Galaxy S23 Ultra RefurbishedXiaomi 15T
BrandSamsungXiaomi
ModelGalaxy S23 Ultra15T
Announced2023, February 012025, September 24
Device type / form familySmartphone—
Release statusAvailable. Released 2023, February 17Available. Released 2025, September 24
Model numbersSM-S918B, SM-S918B/DS, SM-S918U, SM-S918U1, SM-S918W, SM-S918N, SM-S9180, SM-S918E, SM-S918E/DS25069PTEBG

Design

Design specifications comparison
SpecificationSamsung Galaxy S23 Ultra RefurbishedXiaomi 15T
Dimensions163.4 x 78.1 x 8.9 mm (6.43 x 3.07 x 0.35 in)163.2 x 78 x 7.5 mm (6.43 x 3.07 x 0.30 in)
Weight234 g (8.25 oz)194 g (6.84 oz)
Build materialsGlass front (Gorilla Glass Victus 2), glass back (Gorilla Glass Victus 2), aluminum frameGlass front (Gorilla Glass 7i), plastic frame, glass-fiber reinforced plastic back
Form factorTouchscreen smartphone—

Display

Display specifications comparison
SpecificationSamsung Galaxy S23 Ultra RefurbishedXiaomi 15T
DisplayDynamic AMOLED 2X, 120Hz, HDR10+, 1200 nits (HBM), 1750 nits (peak); 6.8 inches, 114.7 cm2 (~89.9% screen-to-body ratio)6.83 inches, 114.5 cm2 (~90.0% screen-to-body ratio); AMOLED, 68B colors, 120Hz, 3840Hz PWM, Dolby Vision, HDR10+, 3200 nits (peak)
Screen resolution1440 x 3088 pixels, 19.3:9 ratio (~500 ppi density)1280 x 2772 pixels, 19.5:9 ratio (~447 ppi density)
Display protectionCorning Gorilla Glass Victus 2Corning Gorilla Glass 7i
Display featuresDynamic AMOLED 2X, 120Hz, HDR10+, 1200 nits (HBM), 1750 nits (peak)AMOLED, 68B colors, 120Hz, 3840Hz PWM, Dolby Vision, HDR10+, 3200 nits (peak)
Display technologyDynamic AMOLED 2X, 120Hz, HDR10+, 1200 nits (HBM), 1750 nits (peak)—
Display size6.8 inches, 114.7 cm2 (~89.9% screen-to-body ratio)—
Refresh rate120Hz—

Performance

Performance specifications comparison
SpecificationSamsung Galaxy S23 Ultra RefurbishedXiaomi 15T
ProcessorQualcomm SM8550-AC Snapdragon 8 Gen 2 (4 nm)Mediatek Dimensity 8400 Ultra (4 nm)
CPUOcta-core (1x3.36 GHz Cortex-X3 & 2x2.8 GHz Cortex-A715 & 2x2.8 GHz Cortex-A710 & 3x2.0 GHz Cortex-A510)Octa-core (1x3.25 GHz Cortex-A725 & 3x3.0 GHz Cortex-A725 & 4x2.1 GHz Cortex-A725)
GPUAdreno 740Mali-G720 MC7

Memory & Storage

Memory & Storage specifications comparison
SpecificationSamsung Galaxy S23 Ultra RefurbishedXiaomi 15T
RAM12GB / 8GB (256GB); 12GB (512GB)12GB
Storage256GB / 512GB256GB / 512GB
Storage technologyUFS 4.0UFS 4.1
Expandable storageNoNo
Memory configurations—256GB 12GB RAM, 512GB 12GB RAM

Cameras

Cameras specifications comparison
SpecificationSamsung Galaxy S23 Ultra RefurbishedXiaomi 15T
Rear camera200 MP, f/1.7, 24mm (wide), 1/1.3", 0.6µm, multi-directional PDAF, OIS 10 MP, f/2.4, 70mm (telephoto), 1/3.52", 1.12µm, PDAF, OIS, 3x optical zoom 10 MP, f/4.9, 230mm (periscope telephoto), 1/3.52", 1.12µm, PDAF, OIS, 10x optical zoom 12 MP, f/2.2, 13mm, 120˚ (ultrawide), 1/2.55", 1.4µm, dual pixel PDAF, Super Steady video50 MP, f/1.7, 23mm (wide), 1/1.55", 1.0µm, PDAF, OIS 50 MP, f/1.9, 46mm (telephoto), 1/2.76", 0.64µm, PDAF, 2x optical zoom 12 MP, f/2.2, 15mm, 120˚ (ultrawide), 1/3.06", 1.12µm
Front camera12 MP, f/2.2, 26mm (wide), 1/3.2", 1.12µm, dual pixel PDAF32 MP, f/2.2, 21mm (wide), 1/3.44", 0.64µm
Rear camera featuresLaser AF, LED flash, auto-HDR, panoramaLeica lens, Color spectrum sensor, Ultra HDR, LED flash, HDR, panorama
Rear camera video8K@24/30fps, 4K@30/60fps, 1080p@30/60/120/240fps, HDR10+, stereo sound rec., gyro-EIS4K@30/60fps, 1080p@30/60/120/240/960fps, gyro-EIS, 10-bit Rec. 2020, HDR10+
Front camera featuresHDR, HDR10+HDR
Front camera video4K@30/60fps, 1080p@30fps4K@30fps, 1080p@30/60fps, HDR10+

Battery & Charging

Battery & Charging specifications comparison
SpecificationSamsung Galaxy S23 Ultra RefurbishedXiaomi 15T
BatteryLi-Ion 5000 mAh5500 mAh
Charging45W wired, PD3.0, 65% in 30 min 15W wireless (Qi) 4.5W reverse wireless67W wired, PD3.0, 100% in 50 min

Software

Software specifications comparison
SpecificationSamsung Galaxy S23 Ultra RefurbishedXiaomi 15T
Operating systemAndroid 13, upgradable to Android 17, up to 4 major OS updates, One UI 9.0Android 15, upgradable to Android 16, HyperOS 3

Network

Network specifications comparison
SpecificationSamsung Galaxy S23 Ultra RefurbishedXiaomi 15T
NetworkGSM / CDMA / HSPA / EVDO / LTE / 5GGSM / HSPA / LTE / 5G
SIM· Nano-SIM + eSIM · Nano-SIM + Nano-SIM + eSIM (max 2 at a time)· Nano-SIM + Nano-SIM + eSIM + eSIM (max 2 at a time) · Nano-SIM + Nano-SIM
2G bandsGSM 850 / 900 / 1800 / 1900 CDMA 800 / 1900 & TD-SCDMAGSM 850 / 900 / 1800 / 1900
3G bandsHSDPA 850 / 900 / 1700(AWS) / 1900 / 2100 CDMA2000 1xEV-DOHSDPA 800 / 850 / 900 / 1700(AWS) / 1900 / 2100
4G bands1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 18, 19, 20, 25, 26, 28, 32, 38, 39, 40, 41, 66 - International 1, 2, 3, 4, 5, 7, 8, 12, 13, 14, 18, 19, 20, 25, 26, 28, 29, 30, 38, 39, 40, 41, 46, 48, 66, 71 - USA1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 18, 19, 20, 26, 28, 32, 38, 40, 41, 42, 48, 66, 71
5G bands1, 2, 3, 5, 7, 8, 12, 20, 25, 28, 38, 40, 41, 66, 75, 77, 78 SA/NSA/Sub6 - International 1, 7, 28, 41, 66, 71, 78, 258, 260, 261 SA/NSA/Sub6/mmWave - USA1, 2, 3, 5, 7, 8, 12, 20, 26, 28, 38, 40, 41, 48, 66, 71, 75, 77, 78 SA/NSA
Network speedHSPA, LTE (CA), 5GHSPA, LTE, 5G

Connectivity

Connectivity specifications comparison
SpecificationSamsung Galaxy S23 Ultra RefurbishedXiaomi 15T
NFCYesYes (market/region dependent)
Bluetooth5.3, A2DP, LE6.0, A2DP, LE
Wi-FiWi-Fi 802.11 a/b/g/n/ac/6e, tri-band, Wi-Fi DirectWi-Fi 802.11 a/b/g/n/ac/6e, dual-band or tri-band, Wi-Fi Direct
PositioningGPS, GALILEO, GLONASS, BDS, QZSSGPS (L1+L5), BDS (B1I+B1c+B2a), GALILEO (E1+E5a), QZSS (L1+L5), NavIC (L5), GLONASS
RadioNoNo
USBUSB Type-C 3.2, OTGUSB Type-C 2.0, OTG
Ultra Wideband (UWB)Supported—
Infrared—Yes

Durability

Durability specifications comparison
SpecificationSamsung Galaxy S23 Ultra RefurbishedXiaomi 15T
Water resistance—IP68 dust tight and water resistant (immersible up to 3m for 30 min)

Features

Features specifications comparison
SpecificationSamsung Galaxy S23 Ultra RefurbishedXiaomi 15T
SensorsFingerprint (under display, ultrasonic), accelerometer, gyro, proximity, compass, barometerFingerprint (under display, optical), accelerometer, gyro, proximity, compass
Desktop modeSamsung DeX, Samsung Wireless DeX (desktop experience support)—
Colors—Black, Gray, Rose Gold

Audio

Audio specifications comparison
SpecificationSamsung Galaxy S23 Ultra RefurbishedXiaomi 15T
LoudspeakersYes, with stereo speakersYes, with stereo speakers (with Dolby Atmos)
3.5 mm headphone jackNoNo
Audio featuresHigh-bitrate audio support24-bit/192kHz Hi-Res & Hi-Res Wireless audio

Refurbished unit information

Refurbished unit information specifications comparison
SpecificationSamsung Galaxy S23 Ultra RefurbishedXiaomi 15T
ConditionRefurbished / EX-UK—

Regulatory

Regulatory specifications comparison
SpecificationSamsung Galaxy S23 Ultra RefurbishedXiaomi 15T
SAR (EU)—0.99 W/kg (head)     0.99 W/kg (body)

Tests

Tests specifications comparison
SpecificationSamsung Galaxy S23 Ultra RefurbishedXiaomi 15T
Performance benchmarks—AnTuTu: 1640253 (v10) GeekBench: 6327 (v6) 3DMark: 3811 (Wild Life Extreme)
Measured display brightness—1525 nits max brightness (measured)
Measured loudspeaker loudness—-24.9 LUFS (Very good)
Active use battery score—Active use score 14:56h

EU label

EU label specifications comparison
SpecificationSamsung Galaxy S23 Ultra RefurbishedXiaomi 15T
Energy—Class A
Battery—57:44h endurance, 1600 cycles
Free fall—Class A (270 falls)
Repairability—Class C

Similarities

  • Both have 120 Hz displays.
  • Both have optical image stabilisation.
  • Both support Wi-Fi 6E.
  • Both have NFC.
  • Both have stereo speakers.
  • Both support 5G networks.

In summary

Get the Xiaomi 15T if you want a bigger battery and faster charging, or the Samsung Galaxy S23 Ultra Refurbished if you would rather have a sharper screen and a higher-resolution main camera.

Back to compared products ↑

In-stock alternatives

Samsung Galaxy S25 FEFor Samsung Galaxy S23 Ultra RefurbishedSamsung Galaxy S25 FEView product ↗iPhone 14 ProFor Samsung Galaxy S23 Ultra RefurbishediPhone 14 ProView product ↗Vivo V70 5GFor Xiaomi 15TVivo V70 5GView product ↗iPhone 14 Pro MaxFor Xiaomi 15TiPhone 14 Pro MaxView product ↗

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