Karbonn Smart A12 Star vs Oppo Ace2: specs comparison

Key differences

Calculated from recorded specifications using minimum difference thresholds. These are differences, not an overall ranking. For three phones, numeric highlights compare the two extremes.

Display technology

OLED versus LCD

Smart A12 Star:

LCD

Ace2:

OLED
Weight

Smart A12 Star: 56 g lighter

Smart A12 Star:

130 g

Ace2:

186 g
Width

Smart A12 Star: 11.2 mm narrower

Smart A12 Star:

64.2 mm

Ace2:

75.4 mm
Screen diagonal

Smart A12 Star: 2.55 in smaller diagonal

Smart A12 Star:

4 in

Ace2:

6.55 in
Rear camera layout

Smart A12 Star:

Single

Ace2:

Quad
Depth

Ace2: 1.5 mm thinner

Smart A12 Star:

10.1 mm

Ace2:

8.6 mm

Physical size

Relative size, not calibrated actual size. Front and side outlines share one scale and a bottom baseline. Generic outlines use recorded body dimensions, excluding camera bumps.

1. Smart A12 Star

Height:

124.2 mm
Width:

64.2 mm
Depth:

10.1 mm +1.5 mm versus Ace2
2. Ace2

Height:

160 mm +35.8 mm versus Smart A12 Star
Width:

75.4 mm +11.2 mm versus Smart A12 Star
Depth:

8.6 mm

Weight

Bars start at zero and share a scale within this chart.

1. Smart A12 Star

130 g
2. Ace2

186 g

+56 g versus Smart A12 Star

Screen size

Approximate rectangular screens calculated from recorded diagonal and aspect ratio at one relative scale. Rounded corners and cutouts are not subtracted. These are not phone outlines or calibrated actual sizes.

1. Smart A12 Star

Screen diagonal:

4 in

Aspect ratio (height:width):

5:3

Approximate rectangular screen area:

45.5 cm²
2. Ace2

Screen diagonal:

6.55 in

Aspect ratio (height:width):

20:9

Approximate rectangular screen area:

103.6 cm²

Ace2 has approximately 127.4% more rectangular screen area than Smart A12 Star.

Memory variants

Each row compares the same storage capacity. Cells show recorded RAM alternatives, not combined maxima. Not recorded does not mean unavailable in every market.

Recorded RAM for Smart A12 Star, Ace2, compared at the same storage capacity.
Storage	Smart A12 Star	Ace2
128 GB	Unknown	8 GB RAM
256 GB	Unknown	8 / 12 GB RAM Alternative RAM configurations

Smart A12 Star: Original memory entry

4 GB · 512 MB RAM

Practical features

Explicit Yes and No values are shown directly. Qualified or regional records retain their details. Unknown means the record is missing.

1. Smart A12 Star

NFC:: Unknown
Headphone jack:: Yes
Memory card support:: See details microSD · up to 32 GB

2. Ace2

NFC:: Yes
Headphone jack:: No
Memory card support:: No

Battery capacity

Capacity is not battery life. No endurance test is implied.

Recorded battery capacity

Bars start at zero and share a scale within this chart.

1. Smart A12 Star

1400 mAh
2. Ace2

4000 mAh

+2600 mAh versus Smart A12 Star

Specifications

Open a section for more detail. On narrow screens, swipe sideways or use Left/Right arrow keys while the table is focused. Unknown means missing data, not No. Recorded zero values are shown as recorded.

1. Smart A12 Star2. Ace2

Everyday essentials

Everyday essentials — specifications for Smart A12 Star, Ace2.
Specification	Smart A12 Star	Ace2
Dimensions (HxWxD)	124.2 Х 64.2 Х 10.1 mm	160 Х 75.4 Х 8.6 mm
Weight	130 g	186 g
Technology	IPS LCD	AMOLED
Screen size	4" inch	6.55" inch
Screen resolution	480 x 800 px	1080 x 2400 px
Internal memory Recorded storage / RAM variants. Entries are alternatives, not a combined maximum. Ambiguous formats stay as recorded.	4 GB 512 MB RAM	128GB 8GB RAM 256GB 8GB RAM 256GB 12GB RAM
Memory card support	microSD up to 32 GB	No
Battery Capacity is not battery life. No endurance test is implied.	1400 mAh Li-Ion	4000 mAh Non-removable Li-Po
Operating system OS	Android 4.4.2 (KitKat)	Android 10.0; ColorOS 7.1
Chipset	Unknown	Qualcomm SM8250 Snapdragon 865 (7 nm+)
NFC	Unknown	Yes
Headphone jack	Yes	No

Display

Display — specifications for Smart A12 Star, Ace2.
Specification	Smart A12 Star	Ace2
Touchscreen	capacitive touchscreen	capacitive touchscreen
Display colors	16M	16M
Screen area	45.5 cm2	103.6 cm2
Screen format	5:3 (height:width)	20:9 (height:width)
Screen to body ratio	57.1%	85.9%
PPI /points per inch/	233 PPI	402 PPI
Screen protection	Unknown	Corning Gorilla Glass 5

Camera and Video

Camera and Video — specifications for Smart A12 Star, Ace2.
Specification	Smart A12 Star	Ace2
Rear camera, main	5 MP Single	48 MP Quad
Camera specs	5 MP	48 MP f/1.7 26mm (wide) 1/2.0'' 0.8µm PDAF -8 MP f/2.2 13mm (ultrawide) 1/4.0'' 1.12µm AF -2 MP B/W (depth) -2 MP (depth)
Functions	LED flash	HDR
Video	Yes	1080p@30fps
Front camera, selfie	0.3 MP Single	16 MP Single
Specifications	VGA	16 MP f/2.4 29mm (wide) 1/3.1'' 1.0µm

Performance

Performance — specifications for Smart A12 Star, Ace2.
Specification	Smart A12 Star	Ace2
Processor CPU	Dual-core 1.2 GHz	Octa-core (1x2.84 GHz Kryo 585 & 3x2.42 GHz Kryo 585 & 4x1.8 GHz Kryo 585)
Graphics processor GPU	Unknown	Adreno 650

General specs

General specs — specifications for Smart A12 Star, Ace2.
Specification	Smart A12 Star	Ace2
Release date	2014 July	2020 April 13
Colors	Black	Aurora Silver Moon Rock Grey Fantasy Purple
Historical recorded price Legacy catalogue value; date unknown. Not a current offer.	50 EUR	520 EUR
Battery life	Stand by time- Up to 300 h	Unknown
Body build	Unknown	Glass front (Gorilla Glass 5) glass back (Gorilla Glass 5) aluminum frame

Communication and Connectivity

Communication and Connectivity — specifications for Smart A12 Star, Ace2.
Specification	Smart A12 Star	Ace2
SIM card	Dual SIM (Micro-SIM dual stand-by)	Dual SIM (Nano-SIM dual stand-by)
Network	Show all network frequencies: -2G - GSM 900 / 1800 - SIM 1 & SIM 2	Show all network frequencies: -2G - GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2CDMA 800 / 1900 & TD-SCDMA -3G - HSDPA 800 / 850 / 900 / 1700(AWS) / 1900 / 2100 CDMA2000 1xEV-DO -4G - LTE band 1(2100) 2(1900) 3(1800) 4(1700/2100) 5(850) 7(2600) 8(900) 12(700) 17(700) 20(800) 34(2000) 38(2600) 39(1900) 40(2300) 41(2500) - China -5G - 5G band 1(2100) 41(2500) 78(3500) 79(4700); SA/NSA - China
Speed	HSPA	HSPA LTE-A
GPRS	Yes	Yes
Edge	Yes	Yes
Wi-Fi	Wi-Fi 802.11 b/g/n hotspot	Wi-Fi 802.11 a/b/g/n/ac/ax dual-band Wi-Fi Direct hotspot
GPS	Yes with A-GPS	Yes with dual-band A-GPS GLONASS BDS GALILEO QZSS
USB	microUSB 2.0	2.0 Type-C 1.0 reversible connector USB On-The-Go
Bluetooth	2.0	5.1 A2DP LE aptX HD
Harmful irradiation	SAR EU - 0.79 W/kg (head)	Unknown

Music and Audio

Music and Audio — specifications for Smart A12 Star, Ace2.
Specification	Smart A12 Star	Ace2
Radio	FM radio	Unknown
Others	Unknown	500 nits typ. brightness (advertised) -HDR10+ -90Hz refresh rate

Other features

Other features — specifications for Smart A12 Star, Ace2.
Specification	Smart A12 Star	Ace2
Dop	Sensors Accelerometer proximity	Sensors Fingerprint (under display optical) accelerometer gyro proximity compass - Fast charging 65W 100% in 30 min (advertised) -SuperVOOC 2.0 -Fast wireless charging 40W 100% in 56 min (advertised) -Wireless reverse charging 10W

Karbonn Smart A12 Star vs Oppo Ace2