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The Adreno 512 is competent with most high fps games. Game mode disables most background tasks and notifications.

6GB is more than enough RAM to futureproof this for many years. The microSD can be formatted both as internal storage and to install apps.

Comms

Comms Wi-Fi AC dual band, Wi-Di, Hotspot
Bluetooth 5.0
NFC
Micro-USB 2.0 OTG

The Wi-Fi AC, MIMO gets 867Mbps at 3 metres from our reference D-Link AC5300 router. That is as fast as you can get without going to a flagship and MU-MIMO.

Bluetooth 5.0 is the latest. It does not have aptX HD or LDAC hi-res audio.

NFC is great for Android Pay.

Sound

Sound 3.5mm audio jack
Earpiece
Down-firing speaker
Software EQ for headphone

The earpiece speaker is for the phone only, e.g. not stereo.

The bottom firing speaker is for hands-free and sounds. It produces a mid-signature for clear voice.

Ringer volume and voice/music were up 75dB. Loud but not the extremely loudness of the Huawei P20 Pro!
OPPO Has an audio heritage, and the frequency response was a full 20Hz to 20kHz when fed to an amp or via Bluetooth to our Sony WH-1000XM2 reference headphones.

It does not support hi-res audio, but it was easy listening.

It has a standard 24-bit DAC, and the supplied buds (very Apple-like) were particularly good.

Other

Other Fingerprint sensor rear
128 facial feature unlock
GPS and e-compass (all)

OPPOs blazingly fast fingerprint sensor does not disappoint. It works every time.

New is Facial Recognition, and it works in all light conditions.

Battery

Battery 3430 mAh battery
VOOC Flash Charge 5V/4A (20W)
5 minutes for 2 hours talk time
USB 2.0
Endurance rating 86hr

It is a full 24-hour battery. We even got two days at one stage.

VOOC is OPPO’s proprietary fast charging. Instead of dumping higher voltages and amperages as Quick Charge does it uses two batteries in parallel instead. That way the 5V/4A charges two 2A batteries that run in parallel. It’s kinder to battery life and does not generate heat.

It will charge from 0-50% in 30 minutes and full in 1.5 hours. A five-minute charge gives two hours of talk time.