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LG Harmony (M257) vs Oppo Find X3 Pro (256GB/12GB)

Side by side comparison between LG Harmony vs Oppo Find X3 Pro phones, differences, pros, cons and full specifications. What's the better?

,
5.3"
IPS

720x1280

8
MP

5mp

1.5GB
RAM

Quad-core

2800
mAh

(Removable)

vs
29Points Oppo Find X3 Pro (256GB/12GB) Compare LG Harmony X
6.7"
AMOLED

1440x3216

50
MP

32mp

12GB
RAM

Octa-core

4500
mAh

(Non removable)

What's the better phone? Oppo Find X3 Pro (256GB/12GB)

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!

Harmony (M257)} 6 Advantages LG Harmony (M257) vs Find X3 Pro (256GB/12GB)} 29 Advantages Oppo Find X3 Pro (256GB/12GB)
+Until 256GB microSD, microSDXCAdvantage
More external storage for files using memory cards
vsNot supported
+142 grams (4.97 ounces)36%
Lighter
vs193 grams (6.76 ounces)
+8 millimeters (0.31 inches)3%
Thinner
vs8.26 millimeters (0.33 inches)
+Li-Ion: lithium-ion (Removable)Advantage
Removable battery can be replaced easily
vsLiPo: li-ion polymer (Non removable)
+3.5mm jackAdvantage
Headsets with 3.5mm Jack size are more common and easy to find in stores
vsType-C reversible connector
+FM (RDS)Advantage
The radio lets you listen to your songs and sports in general
vsNot supported
1.4GHz 64bit Quad-corevs+2.84GHz 64bit Octa-core (5nm)128%
More powerful processor, you can open your applications faster
1.5GB LPDDR3vs+12GB LPDDR57 times
More RAM memory. Typically more responsive and better for multitasking.
16GB (9GB available)vs+256GB (228GB available)24 times
More internal storage for applications and files
Plastic body, glass frontvs+Aluminum frame, glass front/backAdvantage
More resistant material
TFT IPS LCDvs+AMOLEDAdvantage
AMOLED display is brighter and more vivid
16 millionvs+1 billion62 times
More colors on the screen is better quality images and videos
720x1280 pixelsvs+1440x3216 pixels4 times
Higher resolution screen
277 PPIvs+526 PPI90%
Crisper display of text, images and videos because it has more pixels per inch (ppi)
5.3"vs+6.7"26%
Larger screen
(back) 8MPvs+(quad camera) 50MP + 13MP + 50MP + 3MP14 times
Higher resolution main camera
EIS: Digital stabilizationvs+OIS: Optical stabilizationAdvantage
Image stabilization prevents blurry photos and helps in recording motion video
HDR photo only main cameravs+HDR photo/video on both camerasAdvantage
The HDR technology produced photos with more detail in dark areas
f/2.2 (aperture)vs+f/1.8 (aperture)22%
Diaphragm opening (Aperture) of the camera which has the smallest F number takes photos with better light exposure.
(front) 5MPvs+(front) 32MP6 times
Higher resolution secondary camera to take pictures and selfies
Full HD (1920x1080)vs+4K UHD (3840x2160)3 times
More image quality for recording videos with the primary camera
Android 7.0 Nougatvs+Android 11Advantage
Android 11 is newer and safer
4G LTE-Avs+5G SA/NSAAdvantage
The 5G SA/NSA network is newer and faster
(4G LTE-A) 300 Mbpsvs+(5G SA/NSA) 2000 Mbps6 times
Faster for surfing the internet and download files
Not supportedvs+Face unlockAdvantage
Sensors help you use the device
Not supportedvs+Fingerprint sensor (under display)Advantage
Sensors help you use the device
Not supportedvs+GyroscopeAdvantage
Sensors help you use the device
2800 mAhvs+4500 mAh61%
Battery - higher amperage (mAh) allows more device usage time, but it also depends on the hardware and use
1 slot (Single-SIM)
(dedicated slot)
vs+2 slots (Dual-SIM)Advantage
You can have more mobile carriers/operators on the same device.
802.11 b/g/n [wifi4]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 + A2DPvs+5.2 + A2DP/LEAdvantage
Bluetooth 5.2 + A2DP/LE is newer and faster
MicroUSB 2.0, USB OTG On-The-Govs+USB 3.1 Type-C, USB OTG On-The-GoAdvantage
Newer and faster USB version for transferring photos, mp3 or data.
MicroUSB 2.0, USB OTG On-The-Govs+Type-CAdvantage
Reversible connector, you can stick in a USB-C cable any which way; either side is up.
Not supportedvs+Gorilla Glass 5Advantage
Protection against scratches on the screen lets you carry your phone with your keys
Not supportedvs+IP68 certifiedAdvantage
Protection against water allows you talk to your friends in the rain, for example

13 Common items in both devices
LED flash
Only digital zoom
Autofocus / PDAF: phase detection autofocus
(front) Full HD (1920x1080)
Capacitive
Multitouch
Accelerometer
+6 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 Clear highlight

📱 Model features

LG Harmony (M257)Oppo Find X3 Pro (256GB/12GB)
Change model 
ModelHarmony (M257)Find X3 Pro (256GB/12GB)
Other model namesCricket LG Harmony, LG K20 Plus, LG-M257, LGM257OPPO Find X3 Pro 5G (CPH2173, PEEM00)
Country or region availableUSA
USA
(Global, International)
(Global, International)
BrandLGOppo
Release date2/1/20173/19/2021, Announced: 3/11/2021
Depth8 millimeters (0.31 inches)8.26 millimeters (0.33 inches)
Size (width x height)75.29 x 148.7 millimeters (2.96 x 5.85 in)74.4 x 163.6 millimeters (2.93 x 6.44 in)
Weight142 grams (4.97 ounces)193 grams (6.76 ounces)
Build, materialsPlastic body, glass frontAluminum frame, glass front/back
Protection against water and othersNot supportedIP68 certified: water-resistant up to 1.5 meters for 30min and dust-resistant

📲 Display

LG Harmony (M257)Oppo Find X3 Pro (256GB/12GB)
Display typeTFT IPS LCDAMOLED
Screen size5.3" inches6.7" inches
Screen-to-body ratio~69.2% (screen-to-body ratio)~88.7% (screen-to-body ratio)
Display resolution720x1280 pixels1440x3216 pixels (20:9)
TouchscreenCapacitive MultitouchCapacitive Multitouch
Pixel density (dot pitch)277 PPI526 PPI
Colors16 million1 billion
Scratch-resistant glassNot supportedGorilla Glass 5
Refresh ratefeature not registered120Hz
Display featuresfeature not registered500nits[typ], 1300nits[peak]
HDR10+
BT.2020

🤖 Operating System

LG Harmony (M257)Oppo Find X3 Pro (256GB/12GB)
System versionAndroid 7.0 NougatAndroid 11
Firmware updatefeature not registeredfeature not registered
User Interfacefeature not registeredColorOS 11.2

⚙️ Processor

LG Harmony (M257)Oppo Find X3 Pro (256GB/12GB)
Chipset64bit: Qualcomm Snapdragon 425 MSM8917 (28nm)64bit: Qualcomm Snapdragon 888 (SM8350) (5nm)
CPUQuad-core, 1 processor:
4x 1.4GHz ARM Cortex-A53 (Quad-core)
Octa-core, 3 processors:
1x 2.84GHz Kryo 680 (Single-core)
3x 2.42GHz Kryo 680 (Triple-core)
4x 1.8GHz Kryo 680 (Quad-core)
GPU graphical controllerQualcomm Adreno 308 500MhzQualcomm Adreno 660 (840MHz)
Performance (benchmark)feature not registeredAnTuTu: 656467 (v8)
Geekbench: 3316 (v5.1)
GFXBench: 33fps (ES 3.1 onscreen)

💽 Memory and storage

LG Harmony (M257)Oppo Find X3 Pro (256GB/12GB)
RAM memory1.5GB LPDDR312GB LPDDR5
Internal storage16GB (9GB available)256GB (228GB available)
UFS 3.1
External storageUntil 256GB microSD, microSDXC
(dedicated slot)
Not supported

📶 Mobile networks

LG Harmony (M257)Oppo Find X3 Pro (256GB/12GB)
Dual-SIMNot supportedDual-SIM Standby - Call active on one sim card
SIM card1 slot (Single-SIM)
nano-SIM (4FF)
2 slots (Dual-SIM)
nano-SIM (4FF)
Maximum Download / Upload300/50 Mbps2000/1024 Mbps
Network technology2G, 3G, 4G2G, 3G, 4G, 5G
Frequency, bands Expand band details Collapse details
GSM MHz bandQuad-Band 850/900/1800/1900Quad-Band 850/900/1800/1900
Primary 2G networkGSM 850/900/1800/1900CDMA 800, GSM 850/900/1800/1900
Primary 3G networkUMTS 850/1700/1900CDMA2000 1xEV-DO
UMTS 850/900/1700/1900/2100
Primary 4G networkLTE Cat6 700/850/1700/1900 (Bands 2,4,5,12)LTE Cat20
VoLTE
Global version:
LTE (1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 18, 19, 20, 25, 26, 28, 32, 66)
TD-LTE (34, 38, 39, 40, 41, 42)
China version:
LTE (1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 18, 19, 20, 26, 28, 66)
TD-LTE (34, 38, 39, 40, 41, 42)
Primary 5G networkNot supportedSA/NSA
Global version:
(1, 3, 5, 7, 8, 20, 28, 38, 40, 41, 77, 78, 79)
China version:
(1, 2, 3, 5, 7, 8, 12, 20, 28, 38, 40, 41, 66, 77, 78, 79)
Primary data networkGPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, LTE, LTE-AGPRS, EDGE, CDMA2000 EV-DO Rev 0, CDMA2000 EV-DO Rev A, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A, SA/NSA
Secondary 2G networkNot supportedGSM 850/900/1800/1900
Secondary 3G networkNot supportedUMTS 850/900/1700/1900/2100
Secondary 4G networkNot supportedLTE Cat20
VoLTE
Global version:
LTE (1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 18, 19, 20, 25, 26, 28, 32, 66)
TD-LTE (34, 38, 39, 40, 41, 42)
China version:
LTE (1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 18, 19, 20, 26, 28, 66)
TD-LTE (34, 38, 39, 40, 41, 42)
Secondary data networkNot supportedGPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A

📷 Camera

LG Harmony (M257)Oppo Find X3 Pro (256GB/12GB)
Back camera (main camera)8 megapixels(quad camera)
50 megapixels
13MP telephoto f/2.452mm2x-optical-zoomPDAF
50MP ultrawide f/2.216mm110°1/1.56"1.0µmPDAF
3MP microscope f/3.0AFring-flash60x-zoom
Main camera resolution3264x2448 pixels8160x6120 pixels
Video recording (primary)Full HD (1920x1080) 30 fps4K UHD (3840x2160) 60 fps
FlashLED flashLED flash
Focal aperturef/2.2 (aperture)f/1.8 (aperture)
Focal lengthfeature not registered26mm lens
Sensor sizefeature not registered1/1.56" inches
Pixel size1.12µm pixel1µm pixel
AutofocusAutofocusPDAF: phase detection autofocus
Touch focusSupportedSupported
Image stabilizationEIS: Digital stabilizationOIS: Optical stabilization
ZoomOnly digital zoomOnly digital zoom
Face/smile detectionFace detection, Smile detectionFace detection, Smile detection
BSI sensorNot supportedSupported
HDRHDR photo only main cameraHDR photo/video on both cameras
Camera extrasfeature not registered1080p@240fps
Sony IMX766 sensor

📸 Front camera

LG Harmony (M257)Oppo Find X3 Pro (256GB/12GB)
Front camera (secondary)5 megapixels32 megapixels
Front camera resolution2560x1920 pixels6528x4896 pixels
Video recording (secondary)Full HD (1920x1080)Full HD (1920x1080)
Front flashNot supportedNot supported
Focal aperturef/2.4 (aperture)f/2.4 (aperture)
Focal lengthfeature not registered26mm lens
Sensor sizefeature not registered1/2.8" inches
Pixel size1.12µm pixel0.8µm pixel

🔉 Sound and multimedia

LG Harmony (M257)Oppo Find X3 Pro (256GB/12GB)
LoudspeakerSupportedStereo sound
Active noise cancellation2 microphones or more2 microphones or more
RadioFM (RDS)Not supported
TVNot supportedNot supported
Video formatsMP4, H.264, H.263, XviD, MKVMP4, H.265, H.264, H.263, XviD, MKV
Audio formatsMP3, WAV, WMA, eAAC+, FLACMP3, WAV, WMA, eAAC+, FLAC

🔌 Connectivity

LG Harmony (M257)Oppo Find X3 Pro (256GB/12GB)
USBMicroUSB 2.0, USB OTG On-The-GoUSB 3.1 Type-C, USB OTG On-The-Go
Audio output3.5mm jackType-C reversible connector
TV outputNot supportedUSB Type-C (reversible)
Bluetooth4.2 + A2DP5.2 + A2DP/LE
WiFi802.11 b/g/n [wifi4] (2.4GHz)
WiFi Direct, hotspot
802.11 a/b/g/n/ac/ax [wifi6] (2.4GHz, 5GHz) + MIMO
WiFi Direct, hotspot
DLNANot supportedNot supported
GPSA-GPS, GeoTagging, GLONASSA-GPS, GeoTagging, GLONASS, GALILEO, BeiDou, QZSS
NFCSupportedSupported
Infrared portNot supportedNot supported

🧭 Sensors

LG Harmony (M257)Oppo Find X3 Pro (256GB/12GB)
SensorsAccelerometer
Ambient light sensor
Compass
Proximity sensor
Accelerometer
Ambient light sensor
Compass
Face unlock
Fingerprint sensor (under display)
Gyroscope
Proximity sensor
Vibrating alertSupportedSupported

🔋 Battery

LG Harmony (M257)Oppo Find X3 Pro (256GB/12GB)
Battery typeLi-Ion: lithium-ion (Removable)LiPo: li-ion polymer (Non removable)
Battery capacity2800 mAh4500 mAh
Charger, wattsWired charging65W Wired fast charging
Reverse charging by cable
USB Power Delivery 3.0
Inductive / wireless chargingfeature not registered30W Qi Wireless charging (Qi/WPC)
10W Reverse wireless charging
Talk time autonomy14 hoursfeature not registered
Standby350 hours (14.6 days)feature not registered

➕ Other features

LG Harmony (M257)Oppo Find X3 Pro (256GB/12GB)
Call controlVoice dialing, Voice recorderVoice dialing, Voice recorder, Voice commands
MessagingSMS (T9), MMS, E-mail, Push mailSMS (T9), MMS, E-mail, Push mail
Hands-free callingSupportedSupported
Video callingSupportedSupported
RingtonesPolyphonic and customizedPolyphonic and customized
Web browserHTML, XHTML, HTML5HTML, XHTML, HTML5
AntennaInternal antennaInternal antenna
Qwerty physical keyboardNot supportedNot supported
Miscellaneous• Colors: Black
• 2.5D Arc Glass screen
• LG UX 5.0
• Wide-angle 120° front camera
• KnockOn, Knock Code
• VoLTE
• Colors: Gloss Black, Blue, White, Cosmic Mocha, Mars Edition, Photographer Edition

☢️ Radiation rate

LG Harmony (M257)Oppo Find X3 Pro (256GB/12GB)
SAR 1.6W/kg (USA, Mexico, etc.)feature not registeredfeature not registered
SAR 2W/kg (Europe, UK, etc.)feature not registeredfeature not registered
X

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