Xiaomi 小米A2评测

中端智能手机市场，一如往常，热度不减。The Xiaomi Mi A2作为该品牌进军该细分市场的最新力作，无疑将掀起波澜。这是继Mi A1之后，该品牌的第二款 Android One系列设备。

它配备了强劲的中端规格和备受期待的相机，那么它是否真的能掀起波澜？请查看我们的完整评测。

设计与建造

当我们首次在马德里发布会上拿到这款手机时，其设计立刻给我们留下了深刻印象。令人印象深刻的是，它的设计美学与做工质量这两个方面均优于平均水平。

它保留了非 notch 时代的视觉特征，包括较厚的顶部和底部边框、仅中等纤薄的侧边框以及非玻璃后盖。不过，它也并非完全复古，其显著的后置摄像头凸起足以与 iPhone X 相媲美，同时侧面拥有流畅的曲线，组件布局也恰到好处。

我们稍后将深入探讨软件，但我们需要现在就讨论这一点，因为智能手机的屏幕用户界面与硬件本身一样，都是整体设计的重要组成部分——我们在Mi A1上看到了这一点，而看到一台不运行MIUI的Xiaomi设备在视觉上截然不同，对于像我这样偏爱原生Android的用户来说，这无异于一股清新的空气。

正面配备一块5.99英寸FHD+ LTPS显示屏，并采用康宁大猩猩玻璃5代保护。如前所述，该机拥有较厚的顶部和底部边框，以及按2018年标准仍显宽厚的侧边边框。此处其余组件包括20MP前置摄像头、通话扬声器和通知LED灯，均位于顶部边框区域。

背面采用非常出色的光滑哑光铝制材质，布局也颇为简洁。后置双 12MP + 20MP 摄像头模组与 LED 闪光灯以及指纹识别器是我们仅有的配置。Mi A2 是一款相当修长的手机，但即便握持在机身底部，指纹识别器依然易于触及。

背面还印有 Android One 印章，以表明您使用的是 Mi A2，而非其基于 MIUI 的对应机型 Mi 6X。

左侧配备的是双纳米 SIM 卡托盘，没有microSD 卡插槽，这或许是小米 Mi A2 最大的设计缺陷之一。

右侧设有音量滚轮和电源/锁定按钮。按键手感清脆，且电源/锁定按钮位于音量控制键下方，便于拇指操作。

顶部设有副麦克风和红外发射器，底部则包含夹持USB Type-C端口的音频格栅。

握持小米A2手感不错，得益于其弧形边缘和光滑背板，但后者也使其略显滑手。使用Xiaomi随盒附赠的果冻保护壳即可解决这一问题。

显示与多媒体

小米Mi A2配备一块5.99英寸FHD+ (2160 x 1080) LTPS显示屏，像素密度为403ppi。该分辨率足以满足大多数用户的观看需求。屏幕显示清晰锐利、色彩鲜艳，对比度出色，且在晴朗户外阳光下也足够明亮。

由于 Mi A2 运行的是原生 Android，因此没有内置的显示调节软件，但您可获得自适应亮度和“夜间模式”，后者将在设定时间过滤屏幕发出的蓝光。

与其同类的大多数设备一样，这款手机在 Type-C 接口旁配备了一个朝下的单扬声器。音量相当响亮，足以填满一间小型安静房间。音质虽不算惊艳，但毕竟是一部智能手机。高音和中音表现尚可，低音虽有但不强劲。用于免提通话、听音乐、观看视频和玩游戏均表现不错。

相机

小米MIX A2的亮点之一是其相机配置。后置摄像头采用双摄组合，分别搭载 12MP Sony IMX 486 传感器和 20MP Sony IMX 376 传感器。前置摄像头同样采用 20MP Sony IMX 376 传感器。

相机应用是Mi A2上真正“Xiaomi”的少数功能之一，因为它采用了MIUI中的相机。功能包括HDR、HHT（手持夜景）、美颜、全景、人像、移轴、水平校正、多人自拍和手动模式。

这款设备的价格和基础规格是吸引潜在买家的首要因素，但其相机性能却比您想象的要更令人惊喜。它们的表现令人印象深刻。

让我们从后置摄像头开始。首先，自动对焦非常快速且精准。图像极其锐利，即使是远处的微小细节也能被清晰捕捉。不过，色彩表现略显饱和，不太适合后期处理。但总体而言，这意味着照片非常适合直接发布——这正是 Xiaomi 的相机 AI 场景检测在发挥作用，确保曝光和色彩与当前场景相匹配。

动态范围略有不足，但低光表现扎实。

当主体与背景之间有足够的距离时，我们对人像模式的出色表现感到惊喜。该设备的相机人工智能不仅出色地分离了主体和背景，还对各自进行了单独的后处理。

使用后置摄像头进行视频录制是一种梦想体验，拥有极其流畅的防抖功能，并支持高达4K 30fps以捕捉清晰画面。其他视频功能包括延时摄影和 120fps 720p慢动作。

As mentioned earlier, the selfie shooter is a 20MP Sony IMX 376 sensor, same as the secondary rear camera. Quality is good as well, though not the same caliber as the rear pair. Images are still fairly sharp, but colors aren't spot on, especially when capturing skin tones.

Scenarios with bright backlighting or HDR situations make the front camera struggle despite the built-in HDR mode.

Portrait selfies are decent at best, providing good subject-background separation with the right distance, as well as nice bokeh.

The face smoothening/beautification is a little too aggressive and reminds us of OPPO and VIVO phones.

OS, UI, and Apps

At the time of writing, the Mi A2 runs stock Android 8.1 Oreo. Aside from the camera app, you're getting the full vanilla Android experience as intended by Google. It's either preferred by many, or a blank slate for those fond of deep, advanced customization.

There are a lot of users who do like MIUI, but what's nice about this is that there are actually options now. Xiaomi now has three devices (Mi A1, Mi A2, Mi A2 Lite) running stock Android in a sea of MIUI.

The stock Android UI is both clean and functional. It's got those Google-style icons on the default apps, and you have a built-in app drawer if folders and multiple home screens aren't your jam.

Navigation is done with the usual three on-screen buttons (back, home, recent apps), but when Android Pie drops for this device, there will be more gestures available.

The only pre-installed apps here is the typical Google suite, and the only other Xiaomi app other than the camera, is Mi Drop, a P2P file sharing app.

Performance and Benchmarks

Powering the Mi A2 is a Qualcomm Snapdragon 660 octa-core processor clocked at 2.2GHz, Adreno 512 GPU, and 4GB/6GB of LPDDR4X RAM. This is the same configuration found in the Vivo X21, as well as the Nokia 7 Plus. Our unit is the 4GB RAM model.

The Snapdragon 660 is more than a year old at this point, but it's still a very respectable mid-range chip that packs performance and efficiency. Standard, everyday operation is no problem at all, whether it's navigating the UI, browsing the web or social media, media consumption, or taking photos.

The phone scored well in our synthetic benchmark tests, scoring over 131,000 in AnTuTu. Compared to the similarly specced Vivo X21 and Nokia 7 Plus though, it lags behind slightly for some reason. This may be attributed to this model of the Mi A2 having 4GB of RAM instead of 6GB, but it doesn't mean it's a bad performer either.

• AnTuTu v7 - 131,748
• Geekbench 4 - 1,653 (Single-core), 4,836 (Multi-core)
• 3D Mark - 1,269 (SSE – OpenGL ES 3.1), 1,035 (SSE – Vulkan)
• PC Mark  - 6,756

It can handle light to moderate games with ease, no stuttering or frame drops in sight. Heavier, more graphics-intensive games suffer from occasional frame drops at high settings but are still very playable. It gets slightly warm during gaming sessions, but not so much so that it causes discomfort.

Call Quality, Connectivity, and Battery Life

The Mi A2 comes packed with all your standard connectivity features, namely Wi-Fi, Bluetooth 5.0, 4G LTE, and region-based location services (GPS, A-GPS, GLONASS, BDS).

Bluetooth 5.0 is very nice to have as the phone can pair very fast with multiple devices. Not having NFC is strange, especially for a device that is expected to be popular in countries where tap-to-pay systems are growing. GPS is accurate, and I personally had no problems getting around Madrid using Google Maps during the launch last month.

Powering the Mi A2 is a 3,010mAh non-removable Li-ion battery. The included charger is a standard, non-fast charging unit, though Quick Charge 3.0 is supported. Using a QC 3.0 charger, it charges from 0% to 100% in just a little over an hour.

Another thing unimpressive about this phone is battery life, which is just average at best. In our standard video loop test (1080p mp4 video played in a loop, airplane mode, 50% volume and brightness, headphones plugged in), it lasted 12 hours and 31 minutes. In the PC Mark Work 2.0 battery test, it got a result of 7 hours and 44 minutes.

Conclusion

The Xiaomi Mi A2 is a great mid-range device that can almost match the performance of devices like the Vivo X21 and Nokia 7 Plus, which are more expensive. It's not a pure performance standout in the mid-range market since that title now belongs to the Honor Play.

Its most shining attribute, however, is its cameras. We were handily impressed by the capabilities of the rear cameras especially for their ability to deliver great images without having to do any extra work. Whether it's photos or videos, pointing, and clicking is enough. The design and build quality also get high marks from us for the simplicity, sturdy feel, and smoothness.

Perhaps the biggest flaw of the Mi A2 is its battery. We would have loved it even more if it could last longer and if Xiaomi included a QC 3.0 charger in the package. Overall, we cannot recommend the Mi A2 if what you're after, is a performance that lasts the whole day. If you're looking for a mid-range phone that can take amazing photos and videos though, this is it. The 4GB + 64GB variant of the Xiaomi Mi A2 is priced at Php13,990 and is available at Mi Store Philippines branches.

Xiaomi Mi A2 specifications

• 5.99-inch FHD+ LTPS display @ 2160 x 1080px, 403ppi
• Corning Gorilla Glass 5
• Qualcomm Snapdragon 660 2.2GHz Octa-core processor
• Adreno 512 GPU
• 4GB, 6GB LPDDR4X RAM
• 64GB. 128GB internal storage
• 12 MP (f/1.75,, 1.25µm) Sony IMX 486 + 20 MP (f/1.75, 1.0µm) Sony IMX 376 dual rear cameras with LED Flash
• 20 MP (f/1.8, 1.0µm) Sony IMX 376 front camera with HDR
• 4G LTE
• Dual SIM
• WiFi 802.11 a/b/g/n/ac
• Bluetooth 5.0
• GPS, A-GPS, GLONASS, BDS
• Gyroscope
• Fingerprint scanner
• USB 2.0 Type-C (supports Quick Charge 3.0)
• Android One (Android 8.1 Oreo)
• 3,010mAh non-removable battery
• 158.7 x 75.4 x 7.3 mm
• 168 g
• Colors: Gold, Blue, Black

What we liked: 

• Nice big display
• Good design and build quality
• Superb camera quality
• Respectable performance
• Good price point

What we didn't:

• Average battery
• QC 3.0 charger not included
• No micro SD slot
• Huge rear camera bump
• Doesn't perform as well as similarly specced phones