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Smartphone comparison

Samsung Galaxy A18 4G vs OPPO A3

Compare cameras, battery, screen and everyday features.

Compared products
01Selected
Samsung Galaxy A18 4G 128GB

Samsung Galaxy A18 4G 128GB

  • 196 g.
  • 90 Hz display refresh rate.
  • 6.7 inch screen.
  • Exynos 1610 processor.
  • 4 GB RAM in this version.
KSh 25,000Out of Stock
02
OPPO A3

OPPO A3

  • 186 g.
  • Screen: 720 x 1604 pixels, 20:9 ratio (~264 ppi density).
  • Qualcomm SM-6115 Snapdragon 6s 4G Gen1 (11 nm) processor.
  • Storage: eMMC 5.1.
  • 5,100 mAh battery capacity.
KSh 23,600In Stock
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Samsung Galaxy A17 4GKSh 23,000
Samsung Galaxy A26 5GKSh 27,000
Itel Super S26 Ultra 4GKSh 24,500
POCO C85KSh 24,500
Motorola G06 PowerKSh 27,500
OPPO A5 5GKSh 23,800
Vivo Y11dKSh 22,500
2 of 4 products

Our quick verdict

The Samsung Galaxy A18 4G has a sharper OLED screen, runs newer Android 17 with 6 OS upgrades promised and has steadier photos and video (OIS) and sharper selfies (13 MP), while the OPPO A3 charges faster (45 W), is lighter (186 g) and has a headphone jack for wired earphones.

Weight

Samsung Galaxy A18 4G
196 g
OPPO A3
186 g

Display

Samsung Galaxy A18 4G
1080 x 2340 pixels, 19.5:9 ratio (~385 ppi density)
OPPO A3
720 x 1604 pixels, 20:9 ratio (~264 ppi density)

Performance

Samsung Galaxy A18 4G
Exynos 1610 processor
OPPO A3
Qualcomm SM-6115 Snapdragon 6s 4G Gen1 (11 nm) processor

Battery capacity

Samsung Galaxy A18 4G
5,000 mAh battery capacity
OPPO A3
5,100 mAh battery capacity

Charging

Samsung Galaxy A18 4G
25 W rated wired charging power
OPPO A3
45 W rated wired charging power

Key differences

The main differences to help you choose.

Samsung Galaxy A18 4G

  • IP64 water and dust resistance (vs IP54).
  • OLED display (vs LCD).
  • Sharper screen: 385 ppi (vs 264 ppi).
  • Newer Android 17 (vs Android 14).
  • Optical image stabilisation on the main camera.
  • 6 OS upgrades promised.

OPPO A3

  • Faster rated wired charging: 45 W (vs 25 W).
  • Lighter: 186 g (vs 196 g).
  • 3.5 mm headphone jack.

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
PrioritySamsung Galaxy A18 4GOPPO A3
Display6.7-inch OLED display, 90 Hz, 385 ppi6.67-inch LCD display, 90 Hz, 264 ppi
Camera50 MP main camera with OIS50 MP main camera
PerformanceExynos 1610 processorQualcomm SM-6115 Snapdragon 6s 4G Gen1 processor
Storage128 GB storageUp to 256 GB storage
Battery capacity5,000 mAh battery5,100 mAh battery
Charging25 W wired charging45 W wired charging

Detailed comparison

Explore the full specifications, section by section.

General

General specifications comparison
SpecificationSamsung Galaxy A18 4G 128GBOPPO A3
BrandSamsungOPPO
ModelGalaxy A18 4GA3 (CPH2669)
Announced2026, September 152024, August 20
Release status—Available. Released 2024, August 20
Model numbers—CPH2669, CPH3669

Design

Design specifications comparison
SpecificationSamsung Galaxy A18 4G 128GBOPPO A3
Dimensions164.4 x 77.9 x 7.7 mm (6.47 x 3.07 x 0.30 in)165.8 x 76.1 x 7.7 mm (6.53 x 3.00 x 0.30 in)
Weight196 g (6.91 oz)186 g (6.56 oz)
Build materialsGlass front (Gorilla Glass 3), plastic back, plastic frame—
Additional body features—MIL-STD-810H compliant* * does not guarantee ruggedness or use in extreme conditions

Display

Display specifications comparison
SpecificationSamsung Galaxy A18 4G 128GBOPPO A3
Display6.7 inches: Super AMOLED, 90Hz6.67 inches, 107.2 cm2 (~85.0% screen-to-body ratio); IPS LCD, 90Hz, 1000 nits (HBM)
Screen resolution1080 x 2340 pixels, 19.5:9 ratio (~385 ppi density)720 x 1604 pixels, 20:9 ratio (~264 ppi density)
Display protectionCorning Gorilla Glass Victus+, Mohs level 5Panda glass
Display featuresSuper AMOLED, 90Hz90Hz, 1000 nits (HBM)
Display technology—IPS LCD
Display size—6.67 inches
Refresh rate—90Hz
Brightness—1000 nits (HBM)
Pixel density—264 ppi
Aspect ratio—20:9 ratio
Screen-to-body ratio—85.0% screen-to-body ratio

Performance

Performance specifications comparison
SpecificationSamsung Galaxy A18 4G 128GBOPPO A3
ProcessorExynos 1610Qualcomm SM-6115 Snapdragon 6s 4G Gen1 (11 nm)
CPUOcta-core (2x2.4 GHz Cortex-A7X & 6x2.0 GHz Cortex-A55)Octa-core (4x2.1 GHz Cortex-A73 & 4x1.8 GHz Cortex-A53)
GPUMali-G57 MC2Adreno 610
User interface—ColorOS 16
Software support—upgradable to Android 16
Process node—11 nm

Memory & Storage

Memory & Storage specifications comparison
SpecificationSamsung Galaxy A18 4G 128GBOPPO A3
RAM4GB4GB, 6GB, 8GB
Storage128GB128GB, 256GB
Expandable storagemicroSDXC (uses shared SIM slot)microSDXC
Storage technology—eMMC 5.1
Memory configurations—128GB 4GB RAM, 128GB 6GB RAM, 128GB 8GB RAM, 256GB 4GB RAM, 256GB 6GB RAM, 256GB 8GB RAM

Cameras

Cameras specifications comparison
SpecificationSamsung Galaxy A18 4G 128GBOPPO A3
Rear camera50 MP, f/1.8, (wide), 1/2.76", 0.64µm, AF, OIS 5 MP, f/2.2, (ultrawide), 1/5.0", 1.12µm 2 MP (macro)50 MP, f/1.8, (wide), PDAF Auxiliary lens
Front camera13 MP, f/2.0, (wide), 1/3.1", 1.12µm5 MP, f/2.2, (wide)
Rear camera featuresLED flash, panorama, HDRLED flash, HDR, panorama
Rear camera video1080p@30fps1080p@30fps
Front camera featuresHDR—
Front camera video1080p@30fps1080p@30fps
Wide camera—50 MP, f/1.8, (wide), PDAF
Additional rear cameras—Auxiliary lens

Battery & Charging

Battery & Charging specifications comparison
SpecificationSamsung Galaxy A18 4G 128GBOPPO A3
Battery5000 mAh5100 mAh
Charging25W wired45W wired, PD2.0, PPS, 50% in 30 min

Software

Software specifications comparison
SpecificationSamsung Galaxy A18 4G 128GBOPPO A3
Operating systemAndroid 17, up to 6 major OS updates, One UI 9Android 14, upgradable to Android 16, ColorOS 16

Network

Network specifications comparison
SpecificationSamsung Galaxy A18 4G 128GBOPPO A3
NetworkGSM / HSPA / LTEGSM / HSPA / LTE
SIMNano-SIM + Nano-SIMNano-SIM + Nano-SIM
2G bands—GSM 850 / 900 / 1800 / 1900
3G bands—HSDPA 800 / 850 / 900 / 1700(AWS) / 1900 / 2100 - version 1; HSDPA 850 / 900 / 2100 - version 2; HSDPA 900 / 2100 - version 3, version 4
4G bands—1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 18, 19, 26, 28, 38, 40, 41, 66 - version 1; 1, 3, 5, 7, 8, 20, 28, 38, 40, 41 - version 2; 1, 3, 7, 8, 20, 28, 38, 40, 41 - version 3; 1, 3, 5, 8, 40 - version 4
Network speed—HSPA, LTE

Connectivity

Connectivity specifications comparison
SpecificationSamsung Galaxy A18 4G 128GBOPPO A3
NFCYes (market/region dependent)Yes, 360˚ (market/region dependent)
Bluetooth5.3, A2DP, LE5.0, A2DP, LE
Wi-FiWi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi DirectWi-Fi 802.11 a/b/g/n/ac, dual-band
PositioningGPS, GALILEO, GLONASS, BDS, QZSSGPS, GALILEO, GLONASS, BDS, QZSS
RadioFM radio (market/region dependent)—
USBUSB Type-C 2.0USB Type-C 2.0, OTG
Ultra Wideband (UWB)Not Supported—
Satellite featuresNot Supported—

Durability

Durability specifications comparison
SpecificationSamsung Galaxy A18 4G 128GBOPPO A3
Water resistanceIP64 dust protected and water resistant (water splashes)IP54 dust protected and water resistant (water splashes)

Features

Features specifications comparison
SpecificationSamsung Galaxy A18 4G 128GBOPPO A3
SensorsFingerprint (side-mounted), accelerometer, compass Virtual proximity sensingFingerprint (side-mounted), accelerometer, proximity, compass
ColorsGray, Light Blue, BlackSparkle Black, Starry Purple, Starlight White

Audio

Audio specifications comparison
SpecificationSamsung Galaxy A18 4G 128GBOPPO A3
LoudspeakersYesYes
3.5 mm headphone jackNoYes

Similarities

  • Both have 90 Hz displays.
  • Both support Wi-Fi 5.
  • Both have NFC.
  • Both charge over USB-C.
  • Both take two SIM cards.
  • Both have similar screen sizes (6.7 and 6.67 inches).

In summary

Get the Samsung Galaxy A18 4G if you want a sharper OLED screen and newer Android 17 with 6 OS upgrades promised, or the OPPO A3 if you would rather have faster charging and a lighter phone.

Back to compared products ↑

In-stock alternatives

Itel Super S26 Ultra 4GFor Samsung Galaxy A18 4G 128GBItel Super S26 Ultra 4GView product ↗Samsung Galaxy A26 5GFor Samsung Galaxy A18 4G 128GBSamsung Galaxy A26 5GView product ↗OPPO A5 5GFor OPPO A3OPPO A5 5GView product ↗Samsung Galaxy A17 4GFor OPPO A3Samsung Galaxy A17 4GView product ↗

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