The company said in a statement that the device has an AI-enhanced dual camera, a 4230mAh battery, waterdrop design and a 6.2-inch HD+ full-screen display.
The device comes with Corning Gorilla Glass and is based on Android 8.1, with the company's own ColorOS5.2 providing an updated UI.
The AX7 will sell for $399 at JB Hi-Fi, Officeworks, The Good Guys, Woolworths, Mobileciti, Telechoice and Yes Distribution, with a date for its availability yet to be announced.
Michael Tran, the managing director for OPPO Australia, said: "The AX7 is OPPO’s next premium-grade smartphone, giving Aussies access to a beautifully designed smartphone and amazing features, without having to break the bank.
"We believe our customers shouldn’t have to compromise on quality or design when choosing an entry-level smartphone.
"This is what our A series delivers and it continues to be extremely popular with Australians. With the new features and capabilities the AX7 has brought to this price bracket, we expect our latest device to be a major hit locally.”
The AX& will be available in Glaring Gold and Glaze Gold.
OPPO was the top smartphone brand in China in 2016 and ranked fourth worldwide.
Colours: Glaze Blue, Glaring Gold
Operating System: ColorOS 5.2, based on Android 8.1
Processor: Qualcomm Snapdragon 450
Battery: 4230mAh/16.28Wh (TYP)
Storage: 64GB (Expandable up to 256GB)
Size: 6.2 inches
Resolution: HD + (1520 by 720 pixels)
Colours: 16.7 million colors
Touchscreen: Multi-touch, Capacitive Screen (10 points)
Rear Sensor: 13MP & 2MP
Front Sensor: 16-megapixel
Flash: LED Flash
Aperture: Rear: f/2.2 + f/2.4
Frequencies: GSM: 850/900/1800/1900MHz
WCDMA: Bands 1/2/4/5/6/8/19
FDD-LTE: Bands 1/2/3/4/5/7/8/18/19/20/26/28
TD-LTE: Bands 38/39/40/41
SIM Card Type: Nano
Wi-Fi: 2.4GHz 802.11 a/b/g/n