OnePlus 3T (64GB) vs HMD XR21

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Side by side comparison between OnePlus 3T vs HMD XR21 phones, differences, pros, cons and full specifications. What's the better?

2/2/2026 5:48 PM, updated: 2/2/2026 6:11 PM

Compare HMD XR21 X OnePlus 3T (64GB) 05Points

Specifications Compare Models Pictures

5.5"
AMOLED

1080x1920

16
MP

16mp

6GB
RAM

Quad-core

3400
mAh

(Non removable)

21Points HMD XR21 Compare OnePlus 3T X

Specifications Compare Models Pictures

6.49"
IPS

1080x2400

64
MP

16mp

6GB
RAM

Octa-core

4800
mAh

(Non removable)

What's the better phone? HMD XR21

The phonemore's choice is much more technical than personal. Therefore, you shouldn't only consider this. Our goal is to help you, but what's important to us may not be important to you. You decide which one is the best! Comment!

5 Advantages OnePlus 3T (64GB)	vs	21 Advantages HMD XR21
+158 grams (5.53 ounces)46% Lighter	vs	231 grams (8.09 ounces)
+7.35 millimeters (0.29 inches)42% Thinner	vs	10.45 millimeters (0.41 inches)
+Optic AMOLEDAdvantage Optic AMOLED display is brighter and more vivid	vs	TFT IPS LCD
+4K UHD (3840x2160)3 times More image quality for recording videos with the primary camera	vs	Full HD (1920x1080)
+DLNAAdvantage With DLNA technology you can access and play media files on TV, tablet or DLNA compatible device.	vs	Not supported
2.35GHz 64bit Quad-core	vs	+2.2GHz 64bit Octa-core (6nm)34% More powerful processor, you can open your applications faster
64GB (50GB available)	vs	+128GB (101GB available)102% More internal storage for applications and files
1080x1920 pixels	vs	+1080x2400 pixels25% Higher resolution screen
401 PPI	vs	+406 PPI1% Crisper display of text, images and videos because it has more pixels per inch (ppi)
5.5"	vs	+6.49"18% Larger screen
(back) 16MP	vs	+(dual camera) 64MP + 8MP4 times Higher resolution main camera
LED flash	vs	+Dual-LED flashAdvantage The Dual-LED flash helps in dark places or in low light
Not supported	vs	+BSI sensorAdvantage The BSI sensor allows the entry of more light generating photos with more detail and brightness
1/2.8" inches	vs	+1/2" inches40% The larger sensor camera lets you take photos with better depth.
f/2.0 (aperture)	vs	+f/1.8 (aperture)11% Diaphragm opening (Aperture) of the camera which has the smallest F number takes photos with better light exposure.
Android 6.0.1 Marshmallow	vs	+Android 14Advantage Android 14 is newer and safer
4G LTE-A	vs	+5G SA/NSAAdvantage The 5G SA/NSA network is newer and faster
(4G LTE-A) 300 Mbps	vs	+(5G SA/NSA) 2000 Mbps6 times Faster for surfing the internet and download files
Not supported	vs	+BarometerAdvantage Sensors help you use the device
Not supported	vs	+Face unlock 2DAdvantage Sensors help you use the device
3400 mAh	vs	+4800 mAh41% Battery - higher amperage (mAh) allows more device usage time, but it also depends on the hardware and use
2 slots (Dual-SIM)	vs	+2 slots (Dual-SIM) + e-SIM (Eletronic)Advantage You can have more mobile carriers/operators on the same device.
Not supported	vs	+FMAdvantage The radio lets you listen to your songs and sports in general
802.11 a/b/g/n/ac [wifi5]	vs	+802.11 a/b/g/n/ac/ax [wifi6]Advantage WiFi 802.11 a/b/g/n/ac/ax [wifi6] is newer and faster
4.2 + A2DP	vs	+5.1 + A2DP/LEAdvantage Bluetooth 5.1 + A2DP/LE is newer and faster
Not supported	vs	+IP68/IP69K certified, MIL-STD-810G military certifiedAdvantage Protection against water allows you talk to your friends in the rain, for example

27 Common items in both devices

6GB LPDDR4 / 6GB LPDDR4X

16 million

Only digital zoom

PDAF: phase detection autofocus

OIS: Optical stabilization

HDR photo/video on both cameras / HDR photo on both cameras

(front) 16MP

+20 specs and more in the table below

Check the comparison table below for more items that are not evaluated in comparison score above.

Highlight differences

📱 Model features
	OnePlus 3T (64GB)	HMD XR21
Change model
Model	OnePlus 3T (64GB)	HMD XR21
Other model names	OnePlus Three, OnePlus 3T Dual-Sim	HMD XR21 TA-1592
Country or region available	(Global, International), Canada, China, USA, (Europe), Hong Kong	(Global, International)
Brand	OnePlus	HMD
Release date	11/22/2016	5/1/2024, Announced: 5/14/2024
Depth	7.35 millimeters (0.29 inches)	10.45 millimeters (0.41 inches)
Size (width x height)	74.7 x 152.7 millimeters (2.94 x 6.01 in)	78.58 x 168 millimeters (3.09 x 6.61 in)
Weight	158 grams (5.53 ounces)	231 grams (8.09 ounces)
Build, materials	feature not registered	Plastic body, glass front
Protection against water and others	Not supported	IP68/IP69K certified: water-resistant up to 1.5 meters for 30min, dust-resistant, plus high-pressure and steam-washable. MIL-STD-810G military certified: salt, dust, humidity, rain, vibration, solar radiation, transport and thermal shock resistant.
📲 Display
	OnePlus 3T (64GB)	HMD XR21
Display type	Optic AMOLED	TFT IPS LCD
Screen size	5.5" inches	6.49" inches
Screen-to-body ratio	~73.1% (screen-to-body ratio)	~77% (screen-to-body ratio)
Display resolution	1080x1920 pixels	1080x2400 pixels (20:9)
Touchscreen	Capacitive Multitouch	Capacitive Multitouch
Pixel density (dot pitch)	401 PPI	406 PPI
Colors	16 million	16 million
Scratch-resistant glass	Gorilla Glass 4	Gorilla Glass Victus
Refresh rate	feature not registered	120Hz
Display features	feature not registered	450nits[typ], 550nits[peak]
🤖 Operating System
	OnePlus 3T (64GB)	HMD XR21
System version	Android 6.0.1 Marshmallow	Android 13
Firmware update	feature not registered	Android 14
User Interface	feature not registered	feature not registered
⚙️ Processor
	OnePlus 3T (64GB)	HMD XR21
Chipset	64bit: Qualcomm Snapdragon 821 MSM8996 (14nm)	64bit: Qualcomm Snapdragon 695 (SM6375) (6nm)
CPU	Quad-core, 2 processors: 2x 2.35GHz Kryo (Dual-core) 2x 1.6GHz Kryo (Dual-core)	Octa-core, 2 processors: 2x 2.2GHz Kryo 660 Gold (Dual-core) 6x 1.7GHz Kryo 660 Silver (Hexa-core)
GPU graphical controller	Qualcomm Adreno 530	Qualcomm Adreno 619 (840MHz)
Performance (benchmark)	feature not registered	feature not registered
💽 Memory and storage
	OnePlus 3T (64GB)	HMD XR21
RAM memory	6GB LPDDR4	6GB LPDDR4X
Internal storage	64GB (50GB available)	128GB (101GB available) UFS 2.2
External storage	Not supported	Not supported
📶 Mobile networks
	OnePlus 3T (64GB)	HMD XR21
Dual-SIM	Dual-SIM Standby - Call active on one sim card	Dual-SIM Standby - Call active on one sim card
SIM card	2 slots (Dual-SIM) nano-SIM (4FF)	2 slots (Dual-SIM) nano-SIM (4FF) + e-SIM
Maximum Download / Upload	300/50 Mbps	2000/1024 Mbps
Network technology	2G, 3G, 4G	2G, 3G, 4G, 5G
Frequency, bands	Expand band details Collapse details
GSM MHz band	Quad-Band 850/900/1800/1900	Quad-Band 850/900/1800/1900
Primary 2G network	GSM 850/900/1800/1900	GSM 850/900/1800/1900
Primary 3G network	North America model: CDMA2000 EV-DO UMTS 850/900/1700/1900/2100 Europe/Asia model: UMTS 850/900/1900/2100 China model: CDMA2000 EV-DO TD-SCDMA 1900/2000 UMTS 850/900/1900/2100	UMTS 850/900/1700/1900/2100
Primary 4G network	LTE Cat6 North America model: LTE (Bands 1,2,4,5,7,8,12,17,30) Europe/Asia model: LTE (Bands 1,3,5,7,8,20) TD-LTE (Bands 38,40) China model: LTE (Bands 1,3,5,7,8) TD-LTE (Bands 38,39,40,41)	LTE Cat15 (1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 20, 25, 26, 28, 32, 66, 71) TD-LTE (38, 39, 40, 41, 42, 43, 48) VoLTE
Primary 5G network	Not supported	SA/NSA (1, 2, 3, 5, 7, 8, 20, 25, 28, 38, 40, 41, 48, 66, 71, 77, 78, 79)
Primary data network	GPRS, EDGE, CDMA2000 EV-DO Rev 0, CDMA2000 EV-DO Rev A, TD-SCDMA, UMTS, TD-HSDPA, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A	GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A, SA/NSA
Secondary 2G network	GSM 850/900/1800/1900	GSM 850/900/1800/1900
Secondary 3G network	Not supported	UMTS 850/900/1700/1900/2100
Secondary 4G network	Not supported	LTE Cat15 (1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 20, 25, 26, 28, 32, 66, 71) TD-LTE (38, 39, 40, 41, 42, 43, 48) VoLTE
Secondary data network	GPRS, EDGE	GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A, SA/NSA
📷 Camera
	OnePlus 3T (64GB)	HMD XR21
Back camera (main camera)	16 megapixels	(dual camera) 64 megapixels 8MP ultrawide f/2.21/4"1.12µm
Main camera resolution	4608x3456 pixels	10120x6328 pixels
Video recording (primary)	4K UHD (3840x2160) 30 fps	Full HD (1920x1080) 30 fps
Flash	LED flash	Dual-LED flash
Focal aperture	f/2.0 (aperture)	f/1.8 (aperture)
Focal length	feature not registered	feature not registered
Sensor size	1/2.8" inches	1/2" inches
Pixel size	1.12µm pixel	feature not registered
Autofocus	PDAF: phase detection autofocus	PDAF: phase detection autofocus
Touch focus	Supported	Supported
Image stabilization	OIS: Optical stabilization	OIS: Optical stabilization
Zoom	Only digital zoom	Only digital zoom
Face/smile detection	Face detection, Smile detection	Face detection, Smile detection
BSI sensor	Not supported	Supported
HDR	HDR photo/video on both cameras	HDR photo on both cameras
Camera extras	feature not registered	1080p@30fps
📸 Front camera
	OnePlus 3T (64GB)	HMD XR21
Front camera (secondary)	16 megapixels	16 megapixels
Front camera resolution	4608x3456 pixels	4608x3456 pixels
Video recording (secondary)	Full HD (1920x1080)	Full HD (1920x1080)
Front flash	Not supported	Not supported
Focal aperture	f/2.0 (aperture)	feature not registered
Focal length	feature not registered	feature not registered
Sensor size	feature not registered	feature not registered
Pixel size	1µm pixel	feature not registered
🔉 Sound and multimedia
	OnePlus 3T (64GB)	HMD XR21
Loudspeaker	Supported	Stereo sound with dual speakers
Active noise cancellation	2 microphones or more	2 microphones
Radio	Not supported	FM
TV	Not supported	Not supported
Video formats	MP4, H.265, H.264, H.263, DivX, XviD, MKV, WMV	MP4, H.265, H.264, H.263, XviD, MKV
Audio formats	MP3, WAV, WMA, eAAC+, FLAC	MP3, WAV, WMA, eAAC+, FLAC
🔌 Connectivity
	OnePlus 3T (64GB)	HMD XR21
USB	USB 2.0 Type-C reversible connector	USB 2.0 Type-C, USB OTG On-The-Go
Audio output	3.5mm jack	3.5mm jack
TV output	Not supported	USB Type-C (reversible)
Bluetooth	4.2 + A2DP	5.1 + A2DP/LE
WiFi	802.11 a/b/g/n/ac [wifi5] (2.4GHz, 5GHz) + MIMO WiFi Direct, hotspot	802.11 a/b/g/n/ac/ax [wifi6] (2.4GHz, 5GHz) + MIMO WiFi Direct, hotspot
DLNA	Supported	Not supported
GPS	A-GPS, GeoTagging, GLONASS, BeiDou	A-GPS, GeoTagging, GLONASS, GALILEO, BeiDou, NavIC
NFC	Supported	Supported
Infrared port	Not supported	Not supported
🧭 Sensors
	OnePlus 3T (64GB)	HMD XR21
Sensors	Accelerometer Ambient light sensor Compass Fingerprint sensor Gesture Gyroscope Hall effect Proximity sensor	Accelerometer Ambient light sensor Barometer Compass Face unlock 2D Fingerprint sensor (side-mounted) Gyroscope Proximity sensor
Vibrating alert	Supported	Supported
🔋 Battery
	OnePlus 3T (64GB)	HMD XR21
Battery type	LiPo: li-ion polymer (Non removable) 5V 4A	LiPo: li-ion polymer (Non removable)
Battery capacity	3400 mAh	4800 mAh
Charger, watts	Wired charging	33W Wired fast charging Reverse charging by cable Quick Charge 3 USB Power Delivery 2.0
Inductive / wireless charging	feature not registered	Not supported
Talk time autonomy	feature not registered	48 hours (2 days)
Standby	feature not registered	feature not registered
➕ Other features
	OnePlus 3T (64GB)	HMD XR21
Call control	Voice dialing, Voice recorder, Voice commands	Voice dialing, Voice recorder, Voice commands
Messaging	SMS (T9), MMS, E-mail, Push mail	SMS (T9), MMS, E-mail, Push mail
Hands-free calling	Supported	Supported
Video calling	Supported	Supported
Ringtones	Polyphonic and customized	Polyphonic and customized
Web browser	HTML, XHTML, HTML5	HTML, XHTML, HTML5
Antenna	Internal antenna	Internal antenna
Qwerty physical keyboard	Not supported	Not supported
Miscellaneous	• Colors: Gunmetal, Soft gold • USB OTG On-The-Go • Aluminum body • OxygenOS 3.5 • LED notification (RGB) • Rear camera: Sony IMX298 sensor • Front camera: Samsung 3P8SP sensor • Slow motion 720p@120fps • Dash charge • Fast battery charging: 60% in 30min • Dirac HD Sound • Miracast • WiFi dual-band	• Colors: Midnight Black
☢️ Radiation rate
	OnePlus 3T (64GB)	HMD XR21
SAR 1.6W/kg (USA, Mexico, etc.)	feature not registered	feature not registered
SAR 2W/kg (Europe, UK, etc.)	feature not registered	feature not registered