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Smartphone comparison

Xiaomi 15T vs Samsung Galaxy S23 Ultra Refurbished

Compare cameras, battery, screen and everyday features.

Compared products
01Selected
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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02
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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Xiaomi 17T 5GKSh 74,000
Xiaomi 14T ProKSh 73,500
Samsung Galaxy S25 FEKSh 71,000
OnePlus 13s 5GKSh 74,000
Vivo V70 5GKSh 72,700
Oppo Reno15 5GKSh 67,700
Google Pixel 10aKSh 71,000
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

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

Display

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

Performance

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

Storage

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

Battery capacity

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

Key differences

The main differences to help you choose.

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).

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.

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.

More topicsFewer topics
6 priorities selected.
How each product answers the selected priorities
PriorityXiaomi 15TSamsung Galaxy S23 Ultra Refurbished
Display6.83-inch OLED display, 120 Hz, 447 ppi6.8-inch OLED display, 120 Hz, 500 ppi
Camera50 MP main camera with OIS, plus a 2x telephoto camera200 MP main camera with OIS, plus a 3x telephoto camera
PerformanceMediatek Dimensity 8400 Ultra processorQualcomm Snapdragon 8 Gen 2 processor
Memory12 GB RAMUp to 12 GB RAM
Battery capacity5,500 mAh battery5,000 mAh battery
Charging67 W wired charging45 W wired, 15 W wireless charging

Detailed comparison

Explore the full specifications, section by section.

General

General specifications comparison
SpecificationXiaomi 15TSamsung Galaxy S23 Ultra Refurbished
BrandXiaomiSamsung
Model15TGalaxy S23 Ultra
Announced2025, September 242023, February 01
Release statusAvailable. Released 2025, September 24Available. Released 2023, February 17
Model numbers25069PTEBGSM-S918B, SM-S918B/DS, SM-S918U, SM-S918U1, SM-S918W, SM-S918N, SM-S9180, SM-S918E, SM-S918E/DS
Device type / form family—Smartphone

Design

Design specifications comparison
SpecificationXiaomi 15TSamsung Galaxy S23 Ultra Refurbished
Dimensions163.2 x 78 x 7.5 mm (6.43 x 3.07 x 0.30 in)163.4 x 78.1 x 8.9 mm (6.43 x 3.07 x 0.35 in)
Weight194 g (6.84 oz)234 g (8.25 oz)
Build materialsGlass front (Gorilla Glass 7i), plastic frame, glass-fiber reinforced plastic backGlass front (Gorilla Glass Victus 2), glass back (Gorilla Glass Victus 2), aluminum frame
Form factor—Touchscreen smartphone

Display

Display specifications comparison
SpecificationXiaomi 15TSamsung Galaxy S23 Ultra Refurbished
Display6.83 inches, 114.5 cm2 (~90.0% screen-to-body ratio); AMOLED, 68B colors, 120Hz, 3840Hz PWM, Dolby Vision, HDR10+, 3200 nits (peak)Dynamic AMOLED 2X, 120Hz, HDR10+, 1200 nits (HBM), 1750 nits (peak); 6.8 inches, 114.7 cm2 (~89.9% screen-to-body ratio)
Screen resolution1280 x 2772 pixels, 19.5:9 ratio (~447 ppi density)1440 x 3088 pixels, 19.3:9 ratio (~500 ppi density)
Display protectionCorning Gorilla Glass 7iCorning Gorilla Glass Victus 2
Display featuresAMOLED, 68B colors, 120Hz, 3840Hz PWM, Dolby Vision, HDR10+, 3200 nits (peak)Dynamic AMOLED 2X, 120Hz, HDR10+, 1200 nits (HBM), 1750 nits (peak)
Display technology—Dynamic AMOLED 2X, 120Hz, HDR10+, 1200 nits (HBM), 1750 nits (peak)
Display size—6.8 inches, 114.7 cm2 (~89.9% screen-to-body ratio)
Refresh rate—120Hz

Performance

Performance specifications comparison
SpecificationXiaomi 15TSamsung Galaxy S23 Ultra Refurbished
ProcessorMediatek Dimensity 8400 Ultra (4 nm)Qualcomm SM8550-AC Snapdragon 8 Gen 2 (4 nm)
CPUOcta-core (1x3.25 GHz Cortex-A725 & 3x3.0 GHz Cortex-A725 & 4x2.1 GHz Cortex-A725)Octa-core (1x3.36 GHz Cortex-X3 & 2x2.8 GHz Cortex-A715 & 2x2.8 GHz Cortex-A710 & 3x2.0 GHz Cortex-A510)
GPUMali-G720 MC7Adreno 740

Memory & Storage

Memory & Storage specifications comparison
SpecificationXiaomi 15TSamsung Galaxy S23 Ultra Refurbished
RAM12GB12GB / 8GB (256GB); 12GB (512GB)
Storage256GB / 512GB256GB / 512GB
Storage technologyUFS 4.1UFS 4.0
Expandable storageNoNo
Memory configurations256GB 12GB RAM, 512GB 12GB RAM—

Cameras

Cameras specifications comparison
SpecificationXiaomi 15TSamsung Galaxy S23 Ultra Refurbished
Rear camera50 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", 1.12µm200 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 video
Front camera32 MP, f/2.2, 21mm (wide), 1/3.44", 0.64µm12 MP, f/2.2, 26mm (wide), 1/3.2", 1.12µm, dual pixel PDAF
Rear camera featuresLeica lens, Color spectrum sensor, Ultra HDR, LED flash, HDR, panoramaLaser AF, LED flash, auto-HDR, panorama
Rear camera video4K@30/60fps, 1080p@30/60/120/240/960fps, gyro-EIS, 10-bit Rec. 2020, HDR10+8K@24/30fps, 4K@30/60fps, 1080p@30/60/120/240fps, HDR10+, stereo sound rec., gyro-EIS
Front camera featuresHDRHDR, HDR10+
Front camera video4K@30fps, 1080p@30/60fps, HDR10+4K@30/60fps, 1080p@30fps

Battery & Charging

Battery & Charging specifications comparison
SpecificationXiaomi 15TSamsung Galaxy S23 Ultra Refurbished
Battery5500 mAhLi-Ion 5000 mAh
Charging67W wired, PD3.0, 100% in 50 min45W wired, PD3.0, 65% in 30 min 15W wireless (Qi) 4.5W reverse wireless

Software

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

Network

Network specifications comparison
SpecificationXiaomi 15TSamsung Galaxy S23 Ultra Refurbished
NetworkGSM / HSPA / LTE / 5GGSM / CDMA / HSPA / EVDO / LTE / 5G
SIM· Nano-SIM + Nano-SIM + eSIM + eSIM (max 2 at a time) · Nano-SIM + Nano-SIM· Nano-SIM + eSIM · Nano-SIM + Nano-SIM + eSIM (max 2 at a time)
2G bandsGSM 850 / 900 / 1800 / 1900GSM 850 / 900 / 1800 / 1900 CDMA 800 / 1900 & TD-SCDMA
3G bandsHSDPA 800 / 850 / 900 / 1700(AWS) / 1900 / 2100HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100 CDMA2000 1xEV-DO
4G bands1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 18, 19, 20, 26, 28, 32, 38, 40, 41, 42, 48, 66, 711, 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 - USA
5G bands1, 2, 3, 5, 7, 8, 12, 20, 26, 28, 38, 40, 41, 48, 66, 71, 75, 77, 78 SA/NSA1, 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 - USA
Network speedHSPA, LTE, 5GHSPA, LTE (CA), 5G

Connectivity

Connectivity specifications comparison
SpecificationXiaomi 15TSamsung Galaxy S23 Ultra Refurbished
NFCYes (market/region dependent)Yes
Bluetooth6.0, A2DP, LE5.3, A2DP, LE
Wi-FiWi-Fi 802.11 a/b/g/n/ac/6e, dual-band or tri-band, Wi-Fi DirectWi-Fi 802.11 a/b/g/n/ac/6e, tri-band, Wi-Fi Direct
PositioningGPS (L1+L5), BDS (B1I+B1c+B2a), GALILEO (E1+E5a), QZSS (L1+L5), NavIC (L5), GLONASSGPS, GALILEO, GLONASS, BDS, QZSS
RadioNoNo
USBUSB Type-C 2.0, OTGUSB Type-C 3.2, OTG
InfraredYes—
Ultra Wideband (UWB)—Supported

Durability

Durability specifications comparison
SpecificationXiaomi 15TSamsung Galaxy S23 Ultra Refurbished
Water resistanceIP68 dust tight and water resistant (immersible up to 3m for 30 min)—

Features

Features specifications comparison
SpecificationXiaomi 15TSamsung Galaxy S23 Ultra Refurbished
SensorsFingerprint (under display, optical), accelerometer, gyro, proximity, compassFingerprint (under display, ultrasonic), accelerometer, gyro, proximity, compass, barometer
ColorsBlack, Gray, Rose Gold—
Desktop mode—Samsung DeX, Samsung Wireless DeX (desktop experience support)

Audio

Audio specifications comparison
SpecificationXiaomi 15TSamsung Galaxy S23 Ultra Refurbished
LoudspeakersYes, with stereo speakers (with Dolby Atmos)Yes, with stereo speakers
3.5 mm headphone jackNoNo
Audio features24-bit/192kHz Hi-Res & Hi-Res Wireless audioHigh-bitrate audio support

Regulatory

Regulatory specifications comparison
SpecificationXiaomi 15TSamsung Galaxy S23 Ultra Refurbished
SAR (EU)0.99 W/kg (head)     0.99 W/kg (body)—

Tests

Tests specifications comparison
SpecificationXiaomi 15TSamsung Galaxy S23 Ultra Refurbished
Performance benchmarksAnTuTu: 1640253 (v10) GeekBench: 6327 (v6) 3DMark: 3811 (Wild Life Extreme)—
Measured display brightness1525 nits max brightness (measured)—
Measured loudspeaker loudness-24.9 LUFS (Very good)—
Active use battery scoreActive use score 14:56h—

EU label

EU label specifications comparison
SpecificationXiaomi 15TSamsung Galaxy S23 Ultra Refurbished
EnergyClass A—
Battery57:44h endurance, 1600 cycles—
Free fallClass A (270 falls)—
RepairabilityClass C—

Refurbished unit information

Refurbished unit information specifications comparison
SpecificationXiaomi 15TSamsung Galaxy S23 Ultra Refurbished
Condition—Refurbished / EX-UK

Similarities

  • Both have 12 GB RAM.
  • Both have 120 Hz displays.
  • Both have optical image stabilisation.
  • Both support Wi-Fi 6E.
  • Both have NFC.
  • Both have stereo speakers.

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 Xiaomi 15TSamsung Galaxy S25 FEView product ↗Google Pixel 10aFor Xiaomi 15TGoogle Pixel 10aView product ↗Vivo V70 5GFor Samsung Galaxy S23 Ultra RefurbishedVivo V70 5GView product ↗iPhone 14 Pro MaxFor Samsung Galaxy S23 Ultra RefurbishediPhone 14 Pro MaxView product ↗

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