Honor 400 Smart 5G VS Oppo F31 5G

The most consequential difference in this group is water protection. The Honor 400 Smart 5G carries an IP65 rating, meaning it can handle sustained water jets from any direction — solid protection against rain or splashes, but not submersion. The Oppo F31 5G steps up to IP68, which adds full protection against continuous immersion in water. In practice, this means the F31 can survive an accidental drop in a sink or puddle, whereas the Honor 400 Smart cannot. For users who want peace of mind around water, the F31 holds a clear and meaningful edge.

In terms of physical form, the two phones diverge noticeably. The Oppo F31 5G is more compact in every dimension — shorter at 158.2 mm, narrower at 75 mm, and slimmer at 8 mm — resulting in a significantly smaller overall volume of 94.92 cm³ versus the Honor's 107.67 cm³. The Honor 400 Smart is also marginally heavier at 189 g compared to 185 g. While a 4-gram weight difference is barely perceptible, the larger footprint of the Honor does make it a bulkier device to pocket or use one-handed.

Neither device has a rugged build or foldable form factor, so both target the mainstream consumer segment. Overall, the Oppo F31 5G has a clear advantage in this group: it is more compact, slightly lighter, and — most importantly — offers superior water protection with its IP68 rating.

Panel technology is where these two phones diverge most dramatically. The Honor 400 Smart 5G uses an LCD IPS panel, while the Oppo F31 5G is equipped with an OLED/AMOLED display. OLED panels produce true blacks by turning off individual pixels, which translates to higher contrast, more vibrant colors, and better power efficiency when rendering dark content — advantages that are immediately visible in everyday use, whether browsing, streaming, or using dark mode.

Sharpness is another area where the F31 pulls decisively ahead. Its 397 ppi pixel density at a 1080 x 2372 px resolution is substantially crisper than the Honor's 261 ppi at 720 x 1610 px. The real-world gap is significant: at 261 ppi, individual pixels can become noticeable during fine text reading or detailed image viewing, whereas 397 ppi renders content that appears sharp under virtually any normal viewing condition. The Honor does offer a slightly larger 6.77-inch screen, but the lower resolution means that extra canvas comes at a cost to visual fidelity. Both phones share a 120Hz refresh rate, ensuring equally smooth scrolling and animations on either device.

The Oppo F31 5G also includes branded damage-resistant glass, adding a layer of real-world durability the Honor lacks. Neither device supports HDR10, HDR10+, or Dolby Vision, so high-dynamic-range content is off the table for both. Taken together, the F31 holds a commanding advantage in this group — superior panel technology, meaningfully higher pixel density, and added screen protection make it the clear winner for display quality.

At their core, these two phones are built on remarkably similar foundations. Both run on a 6 nm process node with an 8-thread CPU, DDR4 memory at 2133 MHz, identical GPU clock speeds of 950 MHz, and virtually the same memory bandwidth. The Honor 400 Smart 5G is powered by the Qualcomm Snapdragon 6s Gen 3 with an Adreno 619 GPU, while the Oppo F31 5G runs on the MediaTek Dimensity 6300 paired with an Arm Mali-G57 MC2. For everyday tasks — app launches, social media, casual gaming — both chips perform in a similar tier, and the near-identical CPU clock speeds (2.3 GHz vs. 2.4 GHz on the performance cores) mean real-world speed differences will be negligible.

Two specs do separate them, however. The Oppo F31 5G supports multithreading, which allows the CPU to handle more parallel workloads efficiently — a meaningful advantage for users running background-heavy apps or multitasking. More practically, the F31 supports a maximum of 12 GB of RAM versus the Honor's ceiling of 8 GB. Even though both ship with 8 GB today, the F31's higher memory ceiling gives it more headroom for future configurations and better sustains performance when many apps are held in memory simultaneously.

On balance, this is a close category, but the Oppo F31 5G holds a modest edge. Its multithreading support and higher maximum memory capacity make it the more capable platform for demanding or multitasking use cases, even if the gap will be imperceptible to light users.

The rear camera systems on these two phones are, for all practical purposes, identical. Both feature a dual-lens setup led by a 50 MP main sensor, share the same aperture configuration, and are equipped with phase-detection autofocus, continuous autofocus during video, HDR mode, slow-motion recording, and a comparable manual controls suite. Neither offers optical image stabilization or optical zoom, so both phones are on equal footing when it comes to still photography from the back.

Where they split is video and selfies. The Oppo F31 5G tops out at 4K (2160p) at 30 fps for main camera video, while the Honor 400 Smart 5G is capped at 1080p at 30 fps. For users who record travel clips, family moments, or content intended for large screens, 4K recording preserves significantly more detail and offers much greater flexibility for cropping or editing in post. The selfie camera gap is equally stark: the F31 packs a 16 MP front shooter versus the Honor's 5 MP, and the Honor's front aperture of f/2.2 is marginally wider than the F31's f/2.4 — though that small aperture advantage does little to compensate for the large resolution deficit in daylight conditions.

The Oppo F31 5G is the clear winner in this category. Identical rear photo hardware means neither has a stills advantage, but the F31's 4K video capability and substantially higher-resolution front camera make it a more versatile and future-proof imaging device overall.

This is a rare case of complete parity. Both the Honor 400 Smart 5G and the Oppo F31 5G run Android 15 and share an identical feature set across every tracked specification in this group — from privacy controls like location and camera/microphone permissions to usability features such as dark mode, dynamic theming, split-screen support, Picture-in-Picture, and on-device machine learning. There is not a single differentiating data point between them here.

For privacy-conscious users, both phones offer a solid and equivalent baseline: app tracking controls, clipboard warnings, and granular notification permissions are all present on each device. On the productivity side, both support widgets, full-page screenshots, offline voice recognition, and multi-user mode — a feature set that covers the needs of most mainstream Android users without compromise on either handset.

This group is a complete tie. The choice between these two phones cannot be influenced by operating system features based on the available data, and buyers should weigh the differences found in other specification groups — such as display, cameras, or design — to make their decision.

Battery life is a strength for both phones, but the Oppo F31 5G pulls ahead on both key metrics. Its 7000 mAh cell outpaces the Honor 400 Smart 5G's already generous 6500 mAh — a 500 mAh gap that, while not transformative, does translate to a meaningful extra buffer during heavy usage days or when access to a charger is limited. Both phones comfortably exceed the capacities found in most mainstream smartphones, so either should handle a full day with ease.

The more impactful difference, however, is charging speed. The Oppo F31 5G supports 80W fast charging, more than double the Honor's 35W. In practical terms, 80W can take a large battery from near-empty to a usable charge in a fraction of the time — a critical advantage for users with busy schedules who can only plug in briefly. At 35W, the Honor's charging is respectable but noticeably slower by comparison. Both phones ship with a charger in the box, so neither requires an additional purchase to take advantage of their respective speeds.

Neither device offers wireless or reverse wireless charging, keeping that aspect level. Overall, the Oppo F31 5G wins this group convincingly — it holds more capacity and recharges significantly faster, a combination that gives it a substantial real-world endurance advantage over the Honor 400 Smart 5G.

For wireless audio, these two phones are evenly matched. Both support aptX, aptX HD, and LDAC — a strong codec trio that covers high-quality Bluetooth audio for the vast majority of wireless headphones and earbuds on the market. Neither supports aptX Adaptive or aptX Lossless, and neither includes a radio, so that aspect of the comparison is a clean tie. Both also feature stereo speakers, ensuring a similarly immersive experience for media consumption without headphones.

The single differentiating spec here is the 3.5 mm headphone jack, which the Honor 400 Smart 5G retains and the Oppo F31 5G omits. For users with a collection of wired headphones or earphones — particularly audiophiles who prefer wired connections for their lower latency and lossless signal path — this is a genuine and practical advantage. The Oppo F31 5G's users would need to rely on a USB-C adapter or go fully wireless, adding friction and a potential point of failure.

This group goes to the Honor 400 Smart 5G by a narrow but clear margin. The wireless audio capabilities are identical across both devices, but the inclusion of a headphone jack gives the Honor a tangible real-world advantage for anyone who values wired audio flexibility.

Much of the connectivity story here is shared ground. Both phones support 5G, dual SIM, NFC, USB Type-C (USB 2.0), identical Wi-Fi standards (Wi-Fi 5 as the ceiling), GPS with Galileo support, fingerprint scanner, and accelerometer. For most users, this common baseline covers every essential connectivity need without compromise on either device.

Two specs do create a meaningful gap. The Oppo F31 5G features Bluetooth 5.4 versus the Honor 400 Smart 5G's Bluetooth 5.1. While both versions deliver reliable wireless connections, 5.4 brings improvements to connection stability and efficiency that are particularly noticeable in environments with heavy wireless interference. More practically, the F31 also supports a significantly higher cellular download speed of 3300 Mbits/s compared to the Honor's 2500 Mbits/s. In real-world conditions — dense urban areas, stadiums, or congested networks — a higher peak throughput ceiling can translate to faster file downloads and more stable streaming when network load is high.

Neither phone includes a gyroscope, infrared sensor, or external memory slot, keeping those aspects level. On balance, the Oppo F31 5G edges ahead in this group, with its newer Bluetooth version and notably higher 5G download speed ceiling giving it a modest but tangible connectivity advantage.

The miscellaneous specifications for these two phones are identical across every tracked data point. Both include a video light, and neither features a sapphire glass display, curved display, or e-paper display — placing them squarely in the standard mainstream smartphone mold for all of these attributes.

This group is a complete tie. None of the available specs differentiate the Honor 400 Smart 5G from the Oppo F31 5G in any meaningful way, and buyers should look to other specification groups — particularly display, cameras, battery, and design — to inform their decision.