Audio/video content reaches 75dB. The small downwards-firing speaker delivers some upper-bass, extremely good mids and treble falls off from 10kHz. It is a mid-signature that allows substantial adjustment (in headsets anyway) for bass or bright vocal.

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External audio produces an excellent flat 10Hz-30kHz signal at good signal strengths.

Using the standard SBC codec, it produces better than average sound from our reference Sony WH-1000XM2 headsets. Here the Real Original Sound Technology made a huge difference – you could ramp up the bass to booming levels.

Hidden gems

You can enable developer mode and uncover a lot of interesting things.

For example, hidden under Bluetooth Audio Codec, you can enable Bluetooth AVRCPO 1/6. It then allows you to change the SBC (default) to AAC, aptX, aptX HD, and LDAC. You can also get 32-bit/96kHz sound as well.

I re-ran the tests on the Sony WH-1000XM2 headphones that support LDAC. I was blown away – sweet. Oh, and there is a hidden ‘absolute volume’ limiter that can crank out a few dB more from the speaker without perceptible distortion.

Other

OtherMini-Kinect facial recognition technology
No fingerprint scanner

Apple’s iPhone X uses Mini-Kinect technology for 3D facial scanning. Similarly, OPPO uses IR light and projects 15,000 dots to read your face in three dimensions with “millimetre-level” accuracy.

It is fast and accurate even with a .5 second pop-up camera time. AliPay accepts it for e-payments.

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We did not have time to play with the Kinect camera, but it also enables lighting effects (like two coloured lights shining on a subject). Or it can generate animated 3D cartoon avatars – or 3D Omoji in OPPO speak. You can create videos of them and send them through chat apps.

Battery

Battery3730mAh battery
USB-C 3.1 VOOC 5V/4A fast charge
50% in 30 minutes; full charge in 1.5 hours.
90-hour endurance rating (GS9 97-hours)

Note Super VOOC will do 0-100%inb 35 minutes – that is the fastest I have seen.

From dead flat, the first charge was 75% in 30 minutes and a full charge in 1.5 hours – better than claimed.

I ran the standard 1080p video loop at 50% brightness and aeroplane mode. At around 16 hours it is impressive.

I had it for a week. The first two days were intensive, but I still had 30% left after an 18-hour day. Heavy users will charge each night.

But the other five days it was a ‘normal’ phone – calls, web browsing, occasional photos and a bit of GPS. I found it went well past 24 hours use. It usually had about 30% left the next morning after I forgot to charge it the night before.

In any event, VOOC is very fast and very convenient. It uses two internal batteries in parallel. It is much gentler on batteries (far less heat) than other fast charge methods that dump higher voltages into batteries for a quick charge (far more heat).