Samsung Galaxy A8 (2018) review

GSMArena team, 11 January 2018.

Immersive 5.6" AMOLED of 18.5:9 ratio

The new tall screen aspect ratio is the first bridge between the Galaxy A and S lineups. For better or worse this screen ratio has become the hottest trend of 2017 and it's not going away. Naturally, Samsung has to cater to the users' demands and the S8's 18.5:9 Infinity AMOLED is now premiering on the Galaxy A8 (2018).

Samsung Galaxy A8 (2018) review

The resolution has been lowered to fit the A-series profile - there are 1,080 by 2,220 pixels on the A8's screen making for a flagship-grade 441ppi density. The image is sharp, there is no visible pixelization whatsoever, and the Diamond PenTile pattern of the matrix is invisible to the naked eye.

Samsung Galaxy A8 (2018) review

We expected the Galaxy A8 to post similar numbers in the tests as the most recent Samsung we've tested - the J7 Pro, and indeed it did. Maximum brightness in manual mode is reasonable at 390nits. In Auto mode, just like the J7 Pro, the A8 gets a healthy boost up to 590nits.

Display test 100% brightness
Black, cd/m2 White, cd/m2 Contrast ratio
Samsung Galaxy A8 (2018) 0 390
Samsung Galaxy A8 (2018) (Max Auto) 0 590
Samsung Galaxy A7 (2017) 0 425
Samsung Galaxy A7 (2017) Max auto 0 533
Samsung Galaxy A5 (2017) 0 413
Samsung Galaxy A5 (2017) max auto 0 559
OnePlus 5T 0 437
Oppo R11s 0 441
Apple iPhone X 0 679
Samsung Galaxy S8 0 440
Samsung Galaxy S8 Max auto 0 618

Just like any recent Samsung AMOLED, the one on the A8 scored an excellent mark in our sunlight legibility test. This makes the A8 (2018) one of those phones to bring at the beach, especially now that there is ingress protection.

Sunlight contrast ratio

  • Apple iPhone X
    5.013
  • OnePlus 5T
    4.789
  • Samsung Galaxy S8
    4.768
  • Samsung Galaxy S8+
    4.658
  • Samsung Galaxy S6 edge+
    4.615
  • Motorola Moto Z2 Play
    4.459
  • Oppo R11
    4.454
  • Samsung Galaxy S7 edge
    4.439
  • OnePlus 3
    4.424
  • Samsung Galaxy S7
    4.376
  • HTC One A9
    4.274
  • Samsung Galaxy Note7
    4.247
  • Samsung Galaxy A3
    4.241
  • Nokia 8
    4.239
  • Google Pixel 2 XL (pre-update)
    4.234
  • OnePlus 3T
    4.232
  • Google Pixel XL
    4.164
  • ZTE Axon 7
    4.154
  • Samsung Galaxy Note8
    4.148
  • Meizu Pro 7 Plus
    4.147
  • Samsung Galaxy S6 edge
    4.124
  • Samsung Galaxy A7 (2017)
    4.124
  • Huawei Mate 10 Pro (normal)
    4.096
  • Samsung Galaxy Note5
    4.09
  • Google Pixel 2 (pre-update)
    4.023
  • LG V30
    4.022
  • Huawei Nexus 6P
    4.019
  • Samsung Galaxy J7 Pro
    3.998
  • Vivo Xplay5 Elite
    3.983
  • OnePlus X
    3.983
  • Apple iPhone 7
    3.964
  • Oppo R7s
    3.964
  • Apple iPhone 8 (True Tone)
    3.957
  • Huawei P9 Plus
    3.956
  • Meizu Pro 6 Plus
    3.935
  • Lenovo Moto Z
    3.931
  • Samsung Galaxy A7 (2016)
    3.918
  • OnePlus 5
    3.914
  • Samsung Galaxy C5
    3.911
  • Samsung Galaxy C7
    3.896
  • Samsung Galaxy A5
    3.895
  • Samsung Galaxy J7 outdoor
    3.879
  • Samsung Galaxy J2 outdoor
    3.873
  • Samsung Galaxy A8
    3.859
  • Samsung Galaxy A8 (2018)
    3.842
  • Sony Xperia XZs
    3.818
  • Samsung Galaxy A9 (2016)
    3.817
  • Motorola Moto X (2014)
    3.816
  • Samsung Galaxy J7 (2017)
    3.812
  • Samsung Galaxy A5 (2017)
    3.804
  • Samsung Galaxy J7 (2016) outdoor mode
    3.802
  • Xiaomi Redmi Pro
    3.798
  • LG V20 Max auto
    3.798
  • Sony Xperia XZ
    3.795
  • Samsung Galaxy A5 (2016)
    3.789
  • Apple iPhone 6s
    3.783
  • Meizu Pro 5
    3.781
  • Microsoft Lumia 650
    3.772
  • Xiaomi Mi 6
    3.767
  • Sony Xperia XZ1
    3.765
  • Samsung Galaxy J7 (2016)
    3.756
  • Sony Xperia XZ1 Compact
    3.729
  • Apple iPhone 8 Plus (True Tone)
    3.725
  • Oppo F1 Plus
    3.709
  • Vivo X5Pro
    3.706
  • Samsung Galaxy A3 (2017)
    3.688
  • Apple iPhone SE
    3.681
  • Huawei Mate 9
    3.68
  • Samsung Galaxy A7
    3.679
  • Meizu PRO 6
    3.659
  • BlackBerry Priv
    3.645
  • Sony Xperia XA1 Ultra
    3.597
  • Apple iPhone 7 Plus
    3.588
  • LG G6
    3.556
  • Apple iPhone 6s Plus
    3.53
  • Motorola Moto Z Play
    3.526
  • Samsung Galaxy J3 (2016) outdoor mode
    3.523
  • Samsung Galaxy J3 (2016)
    3.523
  • Acer Jade Primo
    3.521
  • Microsoft Lumia 950
    3.512
  • Oppo R7 Plus
    3.499
  • nubia Z11
    3.466
  • Huawei P10 Plus
    3.456
  • HTC U Ultra
    3.453
  • Samsung Galaxy J7
    3.422
  • Meizu MX5
    3.416
  • LG V20
    3.402
  • Huawei P10
    3.379
  • Samsung Galaxy J5 (2016)
    3.378
  • Oppo R9s
    3.352
  • Honor 8 Pro
    3.341
  • Oppo R7
    3.32
  • Lenovo P2
    3.316
  • Archos Diamond Omega
    3.305
  • Honor 9
    3.289
  • Xiaomi Mi 5s
    3.276
  • Nokia 5
    3.261
  • Nokia 6 (Chinese version)
    3.244
  • Nokia 6 (Global version)
    3.238
  • Samsung Galaxy J2
    3.235
  • Sony Xperia X Performance
    3.234
  • Xiaomi Mi Note 2
    3.228
  • Motorola Moto X Play
    3.222
  • Oppo F3 Plus
    3.218
  • Huawei Mate 9 Pro
    3.206
  • Huawei P9
    3.195
  • Xiaomi Mi Mix 2
    3.19
  • ZTE Nubia Z17
    3.159
  • Oppo R11s
    3.153
  • Lenovo Vibe Shot
    3.113
  • HTC U11 Life
    3.108
  • Motorola Moto X Force
    3.105
  • LG Nexus 5X
    3.092
  • HTC U11
    3.089
  • Huawei Mate S
    3.073
  • Microsoft Lumia 640 XL
    3.065
  • Sony Xperia XA1
    3.012
  • Sony Xperia L1
    2.994
  • Sony Xperia X
    2.989
  • LG Q6
    2.987
  • Huawei P10 Lite
    2.974
  • Samsung Galaxy Note
    2.97
  • Sony Xperia Z1
    2.95
  • Huawei Mate 8
    2.949
  • Xiaomi Redmi 4
    2.92
  • Xiaomi Redmi 3S
    2.913
  • Sony Xperia XA Ultra
    2.906
  • LG G5
    2.905
  • HTC One S
    2.901
  • Xiaomi Redmi 3s Prime
    2.893
  • Xiaomi Mi 5s Plus
    2.884
  • Sony Xperia XZ Premium (sRGB)
    2.877
  • Sony Xperia XZ Premium
    2.877
  • Sony Xperia Z5
    2.876
  • Nokia 3
    2.871
  • Microsoft Lumia 550
    2.851
  • Lenovo Moto M
    2.813
  • Xiaomi Redmi 3 Pro
    2.803
  • Sony Xperia Z5 compact
    2.784
  • Nokia 2
    2.752
  • Meizu MX6
    2.751
  • LG V10
    2.744
  • Huawei Mate 10 (normal)
    2.742
  • Xiaomi Redmi 3
    2.735
  • Huawei Honor 7X
    2.734
  • Xiaomi Redmi Note 4 (S625)
    2.714
  • Meizu M5
    2.71
  • Sony Xperia M5
    2.69
  • Xiaomi Mi A1
    2.689
  • Huawei P9 Lite
    2.679
  • Xiaomi Redmi 4 Prime
    2.679
  • vivo V7+
    2.671
  • Vivo V3Max
    2.659
  • Xiaomi Mi Mix
    2.658
  • Huawei Mate 10 Lite
    2.654
  • Oppo F5
    2.653
  • Doogee Mix
    2.642
  • Xiaomi Mi 4i
    2.641
  • Xiaomi Redmi 4a
    2.635
  • Xiaomi Mi 5X (Standard)
    2.616
  • Sony Xperia XA
    2.609
  • Motorola Moto G4 Plus
    2.582
  • Motorola Moto G4 Plus (max auto)
    2.582
  • Meizu M5s
    2.58
  • Xiaomi Mi 4c
    2.574
  • LeEco Le Max 2
    2.567
  • Asus Zenfone 3 ZE552KL
    2.563
  • Microsoft Lumia 640
    2.563
  • Xiaomi Mi Max 2
    2.561
  • HTC U11+
    2.556
  • Lenovo Moto G4
    2.544
  • Lenovo K6 Note
    2.544
  • Oppo F1
    2.528
  • Sony Xperia Z5 Premium
    2.525
  • Huawei Honor 7 Lite / Honor 5c
    2.506
  • Sony Xperia M4 Aqua
    2.503
  • Oppo F1s
    2.481
  • Motorola Moto G
    2.477
  • Lenovo Vibe K5 Plus
    2.473
  • Huawei G8
    2.471
  • Huawei nova
    2.467
  • Sony Xperia Z
    2.462
  • Lenovo Vibe K5
    2.459
  • Meizu m3 max
    2.447
  • Xiaomi Mi 5X (Auto)
    2.417
  • HTC 10 evo
    2.407
  • Huawei Honor 7
    2.406
  • Vivo V7
    2.404
  • Sony Xperia E5
    2.386
  • ZUK Z1 by Lenovo
    2.382
  • HTC 10
    2.378
  • Oppo F3
    2.376
  • vivo V5 Plus
    2.371
  • Meizu m1 note
    2.362
  • Huawei nova plus
    2.329
  • Razer Phone
    2.328
  • HTC One E9+
    2.305
  • Alcatel One Touch Hero
    2.272
  • Apple iPhone 4S
    2.269
  • Lenovo Vibe K4 Note
    2.254
  • Sony Xperia C5 Ultra
    2.253
  • Xiaomi Redmi Note 3 (MediaTek)
    2.249
  • Sony Xperia C4 Dual
    2.235
  • Xiaomi Mi Note
    2.234
  • Motorola Moto G (2014)
    2.233
  • LG Nexus 5
    2.228
  • Huawei P8
    2.196
  • Meizu M5 Note
    2.189
  • Huawei Honor 6
    2.169
  • Xiaomi Redmi Note 2
    2.166
  • OnePlus Two
    2.165
  • HTC One X
    2.158
  • Xiaomi Redmi Note 4 (X20)
    2.145
  • LG Aka
    2.145
  • Archos 50 Diamond
    2.134
  • Xiaomi Redmi Note
    2.119
  • Xiaomi Mi 4S
    2.095
  • Acer Liquid X2
    2.084
  • Huawei P8lite
    2.078
  • vivo V5
    2.059
  • Moto G 3rd gen max manual
    2.026
  • Xiaomi Mi 3
    2.001
  • Xiaomi Mi Max
    1.996
  • Sony Xperia E4g
    1.972
  • OnePlus One
    1.961
  • Meizu m3 note
    1.923
  • BlackBerry Leap
    1.892
  • Meizu m2 note
    1.892
  • HTC Butterfly
    1.873
  • Sony Xperia Z1 Compact
    1.772
  • ZTE Nubia Z9 mini
    1.759
  • Sony Xperia U
    1.758
  • Asus Zenfone Selfie
    1.68
  • Motorola Moto E (2nd Gen)
    1.675
  • ZTE Nubia Z9
    1.659
  • Jolla Jolla
    1.605
  • Motorola Moto E
    1.545
  • Sony Xperia M
    1.473
  • Sony Xperia L
    1.351
  • HTC Desire C
    1.3
  • Meizu MX
    1.221
  • Sony Xperia E
    1.215

Finally, there is one more display test to be aced. Samsung has been a master in color accuracy for quite some time, offering three different and very accurate color profiles (avg deltaE < 2, max deltaE < 4) - sRGB (AMOLED Basic), Adobe RGB (AMOLED Photo), DCI-P3 (AMOLED Cinema). There is also the default Adaptive mode, which has the widest color gamut, and it is calibrated for popping (vivid) colors (avg deltaE of 6.1).

So, the Galaxy A8 (2018) not only comes with an immersive and high-res AMOLED screen, but its panel is nothing short of class-leading.

Battery life

There's a 3,000mAh battery inside the Galaxy A8 (2018), which should be enough for some good power autonomy enhanced by the efficient AMOLED and the 14nm chipset. There is fast charging supported which should fill about 40% of a depleted battery in half an hour.

In our testing, the Galaxy A8 (2018) clocked in 17 hours looping videos and around eleven and a half hours when browsing the web over Wi-Fi. In voice calls, it is close to a full day. Frugal standby consumption helped achieve an overall Endurance rating of 92 hours. The Always-On Display was turned off by default and we kept it this way for our standby test. Keeping it on will noticeably diminish the endurance rating.

Samsung Galaxy A8 (2018) review

Our endurance rating denotes how long a single battery charge will last you if you use the Samsung Galaxy A8 (2018) for an hour each of telephony, web browsing, and video playback daily. We've established this usage pattern so our battery results are comparable across devices in the most common day-to-day tasks. The battery testing procedure is described in detail in case you're interested in the nitty-gritties. You can also check out our complete battery test table, where you can see how all of the smartphones we've tested will compare under your own typical use.

Audio output is nicely clean

The Samsung Galaxy A8 (2018) performed nicely in the first part of our audio quality test. When working with an active external amplifier it produced perfectly clean output and matched that with nicely high volume.

Headphones introduced very little stereo crosstalk so the Galaxy A8 (2018) is much better in that aspect than most of the phones out there. They did bring some intermodulation distortion (which you don't hear easily anyway) and dropped the loudness to just above average, but the rest of the output was unaffected. Overall this is some of the cleanest headphones output we’ve seen on any phone lately.

TestFrequency responseNoise levelDynamic rangeTHDIMD + NoiseStereo crosstalk
Samsung Galaxy A8 (2018)+0.01, -0.03-92.192.20.00380.0085-90.0
Samsung Galaxy A8 (2018) (headphones)+0.30, -0.07-91.791.80.0220.206-72.4
Samsung Galaxy S8++0.01, -0.03-92.192.10.00200.0086-92.5
Samsung Galaxy S8+ (headphones)+0.03, -0.03-92.592.50.00240.046-77.3
Oppo R11s+0.02, -0.02-93.493.20.00250.012-90.8
Oppo R11s (headphones)+0.20, -0.37-93.493.00.0150.320-55.7
OnePlus 5T+0.01, -0.03-94.094.00.00180.011-93.7
OnePlus 5T (headphones)+0.15, -0.09-94.394.30.00710.135-60.1
Xiaomi Mi Mix 2+0.02, -0.02-94.394.30.00380.0072-93.5
Xiaomi Mi Mix 2 (headphones)+0.31, -0.01-93.393.30.0160.243-63.8
LG V30+0.02, -0.01-93.293.10.00080.0069-94.2
LG V30 (headphones)+0.03, -0.02-92.992.90.00570.051-68.1
HTC U11+0.05, -0.11-94.194.10.00170.0067-94.5
HTC U11 (headphones)+0.05, -0.02-93.793.80.00180.105-53.7

Samsung Galaxy A8 (2018)  frequency response
Samsung Galaxy A8 (2018) frequency response

You can learn more about the tested parameters and the whole testing process here.

Loudspeaker

The Galaxy A8 (2018) has a single speaker at its disposal. It is positioned on the right frame above the power button, which, while a little unorthodox, should protect it from accidental muffling in most situations. It is also quite loud, scored a "Very Good" mark in our test, and subjectively - it has a rich and deep sound output.

Speakerphone testVoice, dB Pink noise/ Music, dB Ringing phone, dB Overall score
Sony Xperia XA1 61.7 69.7 71.8 Average
Samsung Galaxy A8 66.7 66.6 75.7 Good
Samsung Galaxy S8 66.2 70.5 72.5 Good
OnePlus 5T 68.4 73.2 69.9 Good
Oppo R11s 67.8 72.9 73.3 Good
Samsung Galaxy A7 (2017) 66.6 66.1 81.5 Good
Samsung Galaxy A8 (2018) 69.2 70.6 81.6 Very Good
Huawei Mate 10 Lite 67.8 71.0 84.5 Very Good
Xiaomi Mi A1 74.0 73.9 90.4 Excellent

Reader comments

I have A8 2018 about a year now, and it's working just fine. No problem at all. I like the build quality of the phone, premium feels like the s-series. The speakers works fine and loud. The battery is superb, always have sot 5 hours more. Cam...

  • Samsung A8

Same issue here. What works for me is just to turn the phone on then plug the charger in when it is turned on on 0%

  • MKR

Same Issue I Am Facing With This Phone. Such A Pathetic Hardware And Firmware. Not Water Resistant, It's Moisture Gainer is One Of The Best Feature Of This Phone. LOL ip68. Too Much Expensive Then Other Mobile Brand With Same Specs.