The Oppo A31 is a budget Android smartphone from OPPO’s 2020 A-series lineup, aimed at users who need a large screen, expandable storage, dual SIM support, and basic LTE connectivity without paying for premium hardware.
Its specification sheet is built around practical essentials: a 6.5-inch IPS LCD, MediaTek Helio P35 chipset, triple rear camera setup, 4230 mAh battery, microSD expansion, and a rear fingerprint scanner. This article focuses on how those specs fit together for value-focused buyers.
Full Specifications
Network
| Technology: | GSM / HSPA / LTE |
| 2G bands: | GSM 850 / 900 / 1800 / 1900 |
| 3G bands: | HSDPA 850 / 900 / 2100 – International |
| HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100 – USA | |
| 4G bands: | 1, 3, 5, 7, 8, 20, 28, 38, 40, 41 – International |
| 1, 2, 3, 4, 5, 7, 8, 28, 38, 41, 66 – USA | |
| 1, 3, 5, 8, 38, 40, 41 – India | |
| 1, 3, 5, 7, 8, 38, 40, 41 – Asia | |
| Speed: | HSPA, LTE |
Launch
| Announced: | 2020, February 13 |
| Status: | Available. Released 2020, February 14 |
Body
| Dimensions: | 163.9 x 75.5 x 8.3 mm (6.45 x 2.97 x 0.33 in) |
| Weight: | 180 g (6.35 oz) |
| Build: | Glass front (Gorilla Glass 3), plastic back, plastic frame |
| SIM: | Nano-SIM + Nano-SIM |
Display
| Type: | IPS LCD, 480 nits (typ) |
| Size: | 6.5 inches, 102.0 cm2 (~82.4% screen-to-body ratio) |
| Resolution: | 720 x 1600 pixels, 20:9 ratio (~270 ppi density) |
| Protection: | Corning Gorilla Glass 3 |
Platform
| OS: | Android 9.0 (Pie), ColorOS 6.1 |
| Chipset: | Mediatek MT6765V/CB Helio P35 (12 nm) |
| CPU: | Octa-core (4×2.3 GHz Cortex-A53 & 4×1.8 GHz Cortex-A53) |
| GPU: | PowerVR GE8320 |
Memory
| Card slot: | microSDXC (dedicated slot) |
| Internal: | 64GB 4GB RAM, 128GB 4GB RAM, 128GB 6GB RAM |
| eMMC 5.1 |
Main Camera
| Triple: | 12 MP, f/1.8, (wide), 1/2.86″, 1.25µm, PDAF 2 MP, f/2.4, (macro) 2 MP, f/2.4, (depth) |
| Features: | LED flash, HDR, panorama |
| Video: | 1080p@30fps |
Selfie camera
| Single: | 8 MP, f/2.0, (wide), 1/4.0″, 1.12µm |
| Features: | HDR |
| Video: | 1080p@30fps |
Sound
| Loudspeaker: | Yes |
| 3.5mm jack: | Yes |
Comms
| WLAN: | Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct |
| Bluetooth: | 5.0, A2DP, LE |
| Positioning: | GPS, GLONASS, BDS |
| NFC: | No |
| Radio: | FM radio |
| USB: | microUSB 2.0, OTG |
Features
| Sensors: | Fingerprint (rear-mounted), accelerometer, gyro, proximity, compass |
Battery
| Type: | Li-Po 4230 mAh |
Misc
| Colors: | Fantasy White, Mystery Black, Lake Green |
| Models: | CPH2015, CPH2073, CPH2081, CPH2029, CPH2031 |
| Price: | $ 76.08 |
Price and Availability
The Oppo A31 offers a compelling combination of features and performance. While the base price is around $76, the actual cost may vary depending on your location and retailer. Below, you’ll find the approximate price of the Oppo A31 converted into various currencies. Please note that these are estimates based on recent exchange rates as of August 21, 2026 and may not reflect the exact price you’ll find at a retailer.
- United States: $76
- Japan: ¥12,084
- United Kingdom: £56
- Australia: A$107
- Canada: C$105
- Taiwan: NT$2,424
- Denmark: kr487
- Saudi Arabia: ﷼285
- South Korea: ₩106,109
- Germany: €65
- Brazil: R$395
- Vietnam: ₫1.982.145
- Kenya: KSh 9,847
- India: ₹7,286
- Indonesia: Rp 1.351.004
- Nigeria: ₦102,560
- Pakistan: ₨21,132
- Philippines: ₱4,696
- Bangladesh: ৳৯,২৯৭
Value Positioning
The Oppo A31 sits firmly in the entry-level smartphone class, and that context matters when reading its specifications. It is not designed to compete with newer 5G phones, high-refresh displays, or advanced camera systems. Instead, it focuses on everyday basics: calling, messaging, social apps, light browsing, casual video streaming, and simple photography.
The phone’s strongest value points are its large display, dedicated microSDXC slot, 3.5mm headphone jack, FM radio, and 4230 mAh battery. Those features remain useful for buyers who prioritize affordability and practicality over raw speed. The listed source price also places it in a low-cost category, though real market pricing can vary by region, condition, storage variant, and seller availability.
Design and Build
At 163.9 x 75.5 x 8.3 mm and 180 g, the Oppo A31 is a fairly large but manageable phone. The build uses a glass front protected by Corning Gorilla Glass 3, combined with a plastic frame and plastic back. That construction is typical for budget phones from its release period, keeping weight and cost under control while still offering basic screen protection.
The rear-mounted fingerprint sensor is a practical choice. It avoids relying only on PIN or face unlock and gives the back panel a familiar layout for users upgrading from older Android phones. Color options include Fantasy White, Mystery Black, and Lake Green, giving the device a more varied look than plain entry-level models.
Display Experience
The 6.5-inch IPS LCD is one of the Oppo A31’s headline usability features. Its 20:9 aspect ratio makes it suited to scrolling feeds, reading articles, and watching widescreen video. The 720 x 1600 pixel resolution works out to about 270 ppi, which is acceptable for basic use but not as sharp as Full HD panels.
Brightness is listed at 480 nits typical, which should be adequate indoors and usable in moderate outdoor conditions. Buyers expecting very crisp text, OLED contrast, or smoother scrolling should look at newer mid-range phones, but for everyday budget use, the screen size is the main advantage here.
Performance and Storage
The Oppo A31 uses the MediaTek Helio P35, a 12 nm chipset with an octa-core Cortex-A53 CPU and PowerVR GE8320 graphics. This platform is intended for basic Android workloads rather than demanding games or heavy multitasking. Apps such as messaging clients, browsers, music players, maps, and social platforms should fit the phone’s intended use better than intensive 3D titles.
Memory options include 64GB with 4GB RAM, 128GB with 4GB RAM, and 128GB with 6GB RAM, using eMMC 5.1 storage. The 128GB variants are more comfortable for long-term use, especially because app sizes and media libraries grow quickly. The dedicated microSDXC slot is important because users can expand storage without sacrificing the second SIM slot.
Camera Setup
The rear camera system combines a 12 MP wide camera with 2 MP macro and 2 MP depth sensors. The main camera is the one that matters most for regular photos, while the macro and depth modules add close-up and portrait-style support. Features include LED flash, HDR, and panorama, with video recording up to 1080p at 30 fps.
The 8 MP front camera also records 1080p video at 30 fps and supports HDR. Overall, this is a basic camera package. It is suitable for daylight photos, video calls, document shots, and casual social sharing, but users who care about night photography, ultrawide framing, optical stabilization, or high-resolution video should consider a newer camera-focused phone.
Battery Life
The 4230 mAh Li-Po battery is a sensible match for the Oppo A31’s hardware. A 720p display and Helio P35 chipset should help keep power demand moderate during routine use. For users who mainly browse, chat, stream music, and make calls, the battery capacity is one of the more reassuring parts of the specification sheet.
The charging and port situation is more dated. The phone uses microUSB 2.0 with OTG support rather than USB-C. That is still functional, but buyers already using USB-C accessories may find it less convenient. There is no fast-charging specification listed in the supplied data, so charging speed should be treated as a basic feature rather than a selling point.
Software and Everyday Use
The Oppo A31 launched with Android 9.0 Pie and ColorOS 6.1. That software base reflects the phone’s 2020 release window, and buyers should be cautious about expecting current Android features or long-term security support. For a used or budget purchase, software condition can matter as much as hardware condition.
ColorOS 6.1 provides OPPO’s customized Android experience, including familiar app management, system tools, and interface changes over stock Android. The rear fingerprint sensor, proximity sensor, accelerometer, gyro, and compass give the phone the expected core sensor set for navigation, screen rotation, unlocking, and basic app features.
Connectivity
The Oppo A31 supports GSM, HSPA, and LTE networks, with regional band sets listed for International, USA, India, and Asia variants. That makes model selection important. Buyers should match the exact model number and regional band support with their carrier before purchase, especially when importing or buying second-hand.
Wireless features include dual-band Wi-Fi 802.11 a/b/g/n/ac, Wi-Fi Direct, Bluetooth 5.0, GPS, GLONASS, and BDS. NFC is not included, so contactless payments and NFC pairing are not part of the package. The phone does include FM radio, a loudspeaker, and a 3.5mm headphone jack, which are still valuable for practical daily use.
Who Should Buy the Oppo A31?
The Oppo A31 makes the most sense for buyers who want an inexpensive LTE phone for basic Android tasks, a large screen, expandable storage, wired headphones, and dual SIM flexibility. It can also work as a backup phone, a first smartphone, or a simple communication device for users who do not need gaming performance or 5G.
It is less suitable for users who want current software, USB-C convenience, NFC payments, high-end cameras, fast charging, or smooth high-refresh-rate display performance. In 2026, the Oppo A31 should be judged as a low-cost utility phone rather than a modern all-rounder.
Conclusion
The Oppo A31 is a practical budget phone with a large display, expandable storage, dual SIM support, a headphone jack, and a dependable-size battery. Its older Android version, microUSB port, basic cameras, and lack of NFC limit its appeal, but it remains a reasonable choice for simple everyday use if the price and condition are right.
References
- OPPO Global Declaration of Conformity – Official OPPO certification page with a CPH2015 download; useful for confirming the manufacturer and model identity behind the Oppo A31 2020.
- FCC Equipment Authorization Search (apps.fcc.gov) – Official U.S. regulator database; search FCC ID R9C-CPH2015 to verify wireless approvals, SAR filings, device photos, and model documentation.
- Bureau of Indian Standards CRS Registration – Official BIS registration record listing OPPO model CPH2015 under mobile phones; useful for regulatory model verification.
- MediaTek Helio P35 Official Product Page – Primary chipset source for verifying Helio P35 CPU, GPU, connectivity, display support, and media capabilities used in the Oppo A31 2020.
- GSMchoice Oppo A31 2020 Technical Specifications – Detailed independent specification reference that clearly identifies the 2020 Oppo A31 as CPH2015 and helps cross-check dimensions, display, memory variants, cameras, battery, and connectivity.
