vivo x300 ultra nanoreview: Specs & Benchmark Guide

The vivo X300 Ultra is a 2026 flagship phone built around a large high-resolution AMOLED display, a Snapdragon 8 Elite Gen 5 platform, and a high-capacity silicon-carbon battery. Its specification profile targets users who want strong performance, advanced photography hardware, and long-term software support in one device.

The phone measures 162.98 mm tall, 76.81 mm wide, and 8.49 mm thick. At 232 grams, it is a substantial device, but the glass rear panel, metal frame, in-display fingerprint scanner, and IP69 water and dust protection give it a premium hardware profile.

The display is one of the phone’s strongest areas. It supports a 144 Hz refresh rate with adaptive operation from 1 Hz to 144 Hz, which can balance smooth motion and power use depending on the task. The listed peak brightness is 1,800 nits, while HDR brightness is rated at 4,500 nits. A third-party peak brightness test listed 3,346 nits under automatic brightness conditions.

The design also includes an advanced vapor chamber cooling system. This is useful for demanding workloads, although sustained performance can vary with ambient temperature, software behavior, and application load.

The vivo X300 Ultra uses Qualcomm’s Snapdragon 8 Elite Gen 5, manufactured on a 3 nm process. The chipset includes eight CPU cores arranged as two prime cores and six performance cores. The listed maximum clock speed reaches 4.608 GHz, while the GPU is an Adreno 840 with a 1,200 MHz clock and approximately 3,686.4 GFLOPS.

The listed configuration includes 12 GB of LPDDR5X RAM, four memory channels, and 256 GB of UFS 4.1 storage. This combination is designed for fast application loading, multitasking, and demanding camera processing.

The AnTuTu result is divided into 1,192,014 CPU points, 1,539,938 GPU points, 525,105 memory points, and 986,376 UX points. These values show that graphics and user-experience performance contribute heavily to the overall score.

NanoReview lists an overall score of 93, with performance rated at 99 and gaming rated at 96. Display is rated at 96, connectivity at 98, and battery at 85. Camera is rated at 94 with an asterisk indicating that the estimate is approximate because the site does not yet have enough test results for a precise calculation.

The camera system is the defining feature of the vivo X300 Ultra specification sheet. Its rear array combines a 200 MP standard camera, a 200 MP telephoto camera, and a 50 MP ultrawide camera. Optical stabilization is listed for the standard and telephoto cameras, while the full rear system supports optical zoom at 3.7x.

The standard camera uses laser autofocus and optical stabilization. The telephoto camera also includes optical stabilization, which can help reduce blur when shooting at longer focal lengths. The ultrawide camera offers a 116-degree field of view for architecture, landscapes, interiors, and group scenes.

Video support is extensive. The rear cameras can record up to 8K at 30 frames per second, 4K at up to 120 frames per second, and 1080p at up to 120 frames per second. Slow-motion capture reaches 240 frames per second at 1080p. The selfie camera supports 4K recording at 60 frames per second and uses digital stabilization.

For the best results, select the standard camera for general scenes, switch to telephoto when you need optical reach, and reserve the ultrawide lens for compositions where perspective and coverage matter more than maximum detail. Pro mode and bokeh mode are also listed among the camera features.

The vivo X300 Ultra includes a 6,600 mAh silicon-carbon battery. It supports 100 W wired charging, 40 W wireless charging, reverse charging, bypass charging, and fast charging. The listed charging test reaches 66% in 30 minutes, with a full charge time of approximately 46 minutes.

Battery testing lists 10 hours and 18 minutes of web browsing, 20 hours and 51 minutes of video playback, and 6 hours and 43 minutes of gaming. Standby time is listed at 137 hours, while general battery life is shown as 29 hours and 11 minutes.

The phone ships with Android 16 and OriginOS 6. The listed support policy includes five years of operating system updates and seven years of security updates. The operating system occupies approximately 60 GB in the listed configuration, so available user storage will be lower than the advertised 256 GB capacity.

The battery system is especially well suited to users who record video, navigate frequently, or keep the display at a high refresh rate. Bypass charging can also be useful during extended plugged-in sessions because it is designed to route power more directly for supported use cases instead of relying only on battery discharge and recharge.

Connectivity is another high point in the vivo X300 Ultra specifications. The phone supports Wi-Fi 7, Bluetooth 6.0, USB Type-C 3.2, DisplayPort output, NFC, infrared, and dual-SIM standby. Its navigation support includes GPS, GLONASS, BeiDou, Galileo, and QZSS.

The stereo speaker system supports Dolby Atmos and reaches a listed maximum loudness of 84.3 dB in testing. There is no 3.5 mm headphone jack, so wired headphones require USB-C accessories or an adapter.

The phone was announced in March 2026 and released in April 2026. The listed launch MSRP is $1,199, although specifications, availability, bundled accessories, and network compatibility may differ by country or region. The charger is not included in the listed package.

For a deeper reference, review the NanoReview specifications and benchmark page for the vivo X300 Ultra. Treat regional confirmation as an essential part of the buying process, particularly for mobile bands, SIM behavior, software features, and included accessories.

The vivo X300 Ultra is most compelling for buyers who prioritize a high-end display, camera versatility, strong benchmark performance, and a large battery. Its main trade-offs are the heavy 232-gram body, non-expandable storage, missing headphone jack, and regional variation in specifications.