Vivo T4x 5G (128GB / 6GB RAM) VS Vivo Y31 5G

In terms of physical form, these two phones are remarkably close. The Vivo T4x 5G measures 165.7 × 76.3 × 8.1 mm and weighs 204 g, while the Vivo Y31 5G comes in at 166.1 × 77 × 8.4 mm and weighs 209 g. The differences — a few millimeters and 5 grams — are essentially imperceptible in daily use. Both phones lack a rugged build and are not foldable, so their physical profiles are squarely in the same category of standard candy-bar smartphones.

Where these two devices meaningfully diverge is in water protection. The T4x 5G carries an IP64 rating, which means it is protected against dust ingress and can handle water splashes from any direction — sufficient for light rain or accidental spills, but not submersion. The Y31 5G steps up significantly with an IP68 rating, certifying it as fully dustproof and capable of withstanding immersion in water under defined conditions. This is reflected in their respective classifications: the T4x is described as ″water resistant,″ while the Y31 is classified as ″waterproof.″ For users who work near water, use their phone outdoors frequently, or simply want greater peace of mind against accidents, this is a tangible, real-world advantage.

The Vivo Y31 5G holds a clear edge in this group. Its superior IP68 protection is the single most consequential design differentiator here, offering a meaningfully higher level of durability against water damage. The T4x 5G's slightly slimmer and lighter build is a minor comfort advantage, but it does not offset the Y31 5G's stronger protection rating for most users.

Both phones use an LCD IPS panel with a 120Hz refresh rate, so scrolling and animations will feel equally fluid on either device. Their screen sizes are also virtually identical at 6.72″ and 6.68″ respectively — a difference no one will notice in hand. The shared refresh rate and panel technology mean neither phone has a fundamental display experience advantage out of the gate.

The critical differentiator here is sharpness. The Vivo T4x 5G renders at 1080 × 2408 px, delivering a pixel density of 393 ppi — crisp enough that individual pixels are invisible to the naked eye at normal viewing distances. The Vivo Y31 5G, by contrast, resolves at only 720 × 1608 px, yielding just 264 ppi. That gap is substantial and visible: text edges will appear softer, fine detail in images less defined, and the overall image noticeably less sharp on the Y31 5G, particularly when reading small text or viewing photos up close.

The Y31 5G does counter with one meaningful advantage: it features branded damage-resistant glass, giving its screen better protection against scratches and minor impacts — something the T4x 5G lacks. However, screen protection is a one-time safeguard that a case or screen protector can partially replicate, whereas pixel density affects every single moment of use. On balance, the Vivo T4x 5G holds a clear display edge, with its full HD+ resolution making a tangible, daily difference in visual quality.

On the surface, these two phones look evenly matched: identical storage, identical RAM, both built on a 4nm process, both running DDR5 memory with a maximum expandable cap of 16GB. Dig deeper into the silicon, however, and meaningful gaps emerge. The Vivo T4x 5G is powered by the MediaTek Dimensity 7300, which fields four high-performance cores clocked at 2.5 GHz — compared to just two performance cores at 2.3 GHz on the Snapdragon 4 Gen 2 inside the Vivo Y31 5G. In sustained workloads like gaming, video editing, or running multiple apps simultaneously, having more high-clock cores translates to noticeably snappier responsiveness.

The memory subsystem gap is even starker. The T4x 5G's RAM operates at 6400 MHz, double the Y31 5G's 3200 MHz. Faster memory bandwidth directly accelerates data throughput between the CPU and RAM, which benefits everything from app launch times to multitasking fluidity. On the graphics side, the T4x 5G's Mali G615 MC2 GPU runs at 1047 MHz versus the Adreno 613's 955 MHz — a modest but real advantage for gaming frame rates and graphical tasks. The Y31 5G does uniquely support 2 external displays versus the T4x 5G's single display output, which could matter for productivity-focused users who want to mirror or extend their screen.

Overall, the Vivo T4x 5G holds a clear performance advantage in this group. Its faster CPU configuration, significantly quicker RAM, and higher GPU clock speed collectively point to a more capable everyday performer, while the Y31 5G's dual-display support is a niche benefit unlikely to sway most buyers.

The rear camera systems tell two different stories. Both phones lead with a 50MP primary sensor, but the Vivo T4x 5G pairs it with a secondary 2MP depth lens, giving it a dual-camera setup — useful for portrait-mode depth processing. The Vivo Y31 5G goes single-lens, which simplifies the hardware but removes that dedicated depth-sensing capability. Aperture-wise, the Y31 5G's sole lens opens to a wide f/1.8, matching only the secondary lens of the T4x 5G; the T4x's primary lens is actually narrower at f/2.4, meaning it lets in less light on its main shooter — a subtle but worth-noting trade-off in low-light stills.

The most decisive gap in this group is video capability. The T4x 5G tops out at 2160p (4K) at 30fps, while the Y31 5G is capped at 1080p at 30fps. For anyone who shoots video — travel clips, family moments, content creation — 4K recording offers significantly more detail and future-proofing when cropping or downscaling footage. The Y31 5G does counter with 2 flash LEDs versus the T4x 5G's single LED, which can produce slightly more even and natural-looking flash illumination, though this is a minor advantage in practice. Both phones share an identical 8MP front camera and an extensive, well-matched set of manual controls and shooting modes.

The Vivo T4x 5G takes the camera edge, and it is not particularly close. Its 4K video recording capability is a generational step above the Y31 5G's 1080p ceiling, and its dual-rear-camera configuration adds versatility for portrait shooting. The Y31 5G's wider primary aperture and dual flash are genuine merits, but they do not offset the T4x 5G's advantages for users who care about video quality and camera flexibility.

This is a rare case of a complete draw. Both the Vivo T4x 5G and the Vivo Y31 5G run Android 15 and share an identical feature set across every single spec in this group — no exceptions. From privacy controls like location and camera/microphone permissions to usability features like split-screen multitasking, Picture-in-Picture, dynamic theming, and offline voice recognition, the two phones are software twins.

Practically speaking, users of either device will have access to the same productivity tools, the same privacy safeguards, and the same day-to-day Android experience. Notable shared strengths include on-device machine learning, battery health monitoring, and robust customization options like dynamic theming and widget support — a well-rounded Android 15 package either way. Neither phone receives direct OS updates or supports Wi-Fi password sharing, which are shared limitations equally applicable to both.

There is no winner in this group — it is a complete tie. Every capability and every limitation is identical across both devices. Software experience should not factor into a buyer's decision between these two phones; the differentiators lie entirely in the other spec groups.

Battery is another category where these two phones are spec-for-spec identical. Both the Vivo T4x 5G and the Vivo Y31 5G pack a 6500 mAh cell — a generously large capacity that comfortably places both devices in the heavy-duty endurance tier, well above the 5000 mAh that has become the mainstream baseline. Users of either phone can realistically expect to stretch through a full day of heavy use, and lighter users may find themselves charging every other day.

Replenishment speed is equally matched: both charge at 44W and both ship with a charger in the box. At 44W, filling a 6500 mAh battery from low to full typically takes under 90 minutes — a solid but not class-leading pace. Neither phone supports wireless charging, which is a shared omission worth noting for users who have invested in wireless charging ecosystems.

As with the operating system group, this is a complete tie. Every battery specification — capacity, charging speed, included accessories, and feature support — is identical. Battery life and charging behavior will not distinguish these two phones from each other; buyers should look to other spec groups to make their decision.

Audio is yet another group where the two phones mirror each other exactly. Both the Vivo T4x 5G and the Vivo Y31 5G feature stereo speakers — a welcome inclusion at this price tier that makes media consumption, gaming, and speakerphone calls noticeably more immersive than a single mono driver. Neither phone offers a 3.5mm headphone jack, so wired audio enthusiasts will need a USB-C adapter on either device.

On the wireless audio front, both phones lack high-fidelity Bluetooth codec support — no aptX, no LDAC, no aptX HD or Adaptive variants. For most users streaming music at typical quality levels this will go unnoticed, but audiophiles pairing premium wireless headphones will not get the lossless or high-resolution audio transmission that those codecs enable. Again, this limitation applies equally to both phones.

This group is a complete tie in every respect — shared strengths, shared omissions. Neither the T4x 5G nor the Y31 5G has any audio advantage over the other, and sound quality from speakers or wireless headphones should be expected to be equivalent on both devices.

Wireless connectivity is where the Vivo T4x 5G pulls decisively ahead. It supports Wi-Fi 6 (802.11ax) in addition to Wi-Fi 5 and Wi-Fi 4, while the Vivo Y31 5G tops out at Wi-Fi 5. Wi-Fi 6 delivers better throughput, lower latency, and significantly improved performance in congested environments — a real-world benefit in busy households or public spaces with many connected devices. The Bluetooth gap is even more striking: the T4x 5G runs Bluetooth 5.4 versus the Y31 5G's considerably older Bluetooth 4.2. The newer version brings improved range, connection stability, and energy efficiency — meaningful for anyone who regularly uses wireless earbuds, smartwatches, or other Bluetooth peripherals.

Cellular speeds tell a similar story. Both phones support 5G, but the T4x 5G's upload speed reaches 3270 Mbps against the Y31 5G's 900 Mbps — a more than threefold difference that matters for users who upload large files, stream live video, or use cloud-based workflows on mobile data. The T4x 5G also adds a gyroscope and an infrared sensor, neither of which the Y31 5G has. The gyroscope enables more accurate motion-based gaming and AR applications, while the IR sensor allows the phone to function as a universal remote for TVs and other appliances. The Y31 5G's sole counter-advantage is its external memory card slot, which the T4x 5G lacks — a genuine plus for users who want expandable storage flexibility.

The Vivo T4x 5G holds a commanding edge in this group. Its Wi-Fi 6 support, vastly superior Bluetooth version, much faster upload speeds, gyroscope, and IR blaster collectively represent a richer and more future-ready connectivity package. The Y31 5G's expandable storage slot is a useful but narrow advantage that does not offset the breadth of what it concedes here.

The Miscellaneous group offers nothing to separate these two devices. Both the Vivo T4x 5G and the Vivo Y31 5G share every attribute here identically — each has a video light, and neither features a sapphire glass display, a curved display, or an e-paper display. This is a complete tie with no differentiating factors to analyze.