Sonim XP400

The Sonim XP400 features a rugged build designed to withstand harsh environments, backed by an IP68 ingress protection rating that classifies it as fully waterproof. The device stands 170 mm tall and 78 mm wide, with a thickness of 10.2 mm and a total volume of 135.252 cm³, while tipping the scales at 230 g. It does not have a folding form factor, maintaining a traditional fixed-body construction throughout.

The Sonim XP400 uses a 6.5-inch IPS LCD touchscreen with a resolution of 720 x 1612 px and a pixel density of 272 ppi, offering a reasonably sized panel for everyday use. The display is protected by Gorilla Glass Victus 2, providing branded damage resistance. It does not support HDR10, HDR10+, Dolby Vision, or an Always-On Display mode, and there is no secondary screen present on the device.

The Sonim XP400 is driven by the Qualcomm Snapdragon 4 Gen 2 chipset, built on a 4 nm process with an octa-core CPU configuration running at 2 x 2.3 GHz and 6 x 2 GHz using big.LITTLE technology, alongside an Adreno 613 GPU clocked at 955 MHz that supports up to two displays. The SoC includes integrated LTE and integrated graphics, supports 64-bit processing, and carries a thermal design power of 4W. System memory stands at 6 GB of LPDDR5 RAM running at 3200 MHz, with a maximum supported memory ceiling of 16 GB, while the 128 GB of internal eMMC 5.1 storage can be expanded by up to 2000 GB via external memory. On the software side, the chipset supports DirectX 12, OpenGL ES 3.2, and OpenCL 2, and hardware-level security is reinforced through TrustZone integration.

The Sonim XP400 features a dual-lens rear camera system combining a 50 MP primary sensor and a 5 MP secondary lens, both using a CMOS sensor without back-side illumination. The main camera supports phase-detection autofocus for stills, continuous autofocus during video, and touch autofocus, though it lacks laser autofocus and optical image stabilization. Video recording tops out at 1080p at 30 fps with slow-motion support, but HDR10 and Dolby Vision recording are not available. A single LED flash is present, with no dual-tone or RGB variants, and there is no front-facing flash. Manual controls cover exposure, ISO, focus, and white balance, while burst mode and in-camera panoramas are also supported — however, manual shutter speed, RAW capture, and 360-degree panoramas are absent. The 8 MP front camera is a single-lens unit positioned conventionally, not under the display, and 3D photo or video recording is not supported.

The Sonim XP400 runs Android 14 and ships with a broad set of privacy controls, including clipboard warnings, location privacy options, and camera and microphone access management, though Mail Privacy Protection and cross-site tracking blocking are not present. On the personalization side, the OS supports dark mode, dynamic theming, theme customization, customizable notifications, widgets, and a media picker, while focus modes, app offloading, and Quick Start are not available. Productivity features include split-screen multitasking, Picture-in-Picture, full-page screenshots, sharing intents, and the ability to play games while they download, though the device cannot be used as a PC. Privacy and utility tools extend further with on-device machine learning, offline voice recognition, voice commands, phone tracking, a child lock, a battery health check, an extra dim mode, and multi-user support. Wi-Fi password sharing is not supported, and OS updates do not arrive directly from the vendor.

The Sonim XP400 is equipped with a 5000 mAh rechargeable battery that includes a battery level indicator, and a charger is included in the box. The battery is fixed and non-removable, and the device does not support wireless charging or fast charging.

The Sonim XP400 includes stereo speakers and a built-in radio, and it records audio through a dual-microphone setup. There is no 3.5 mm headphone jack, and Bluetooth audio codec support is limited — aptX, aptX HD, aptX Adaptive, aptX Lossless, and LDAC are all absent.

The Sonim XP400 supports 5G connectivity alongside dual SIM operation, Wi-Fi 4 and Wi-Fi 5, and Bluetooth 5.1, with download speeds of up to 2500 Mbits/s and upload speeds reaching 900 Mbits/s. The device connects via USB Type-C with USB 3.1, includes an external memory slot, and supports NFC. For biometric security, a fingerprint scanner is present, though 3D facial recognition and an iris scanner are not. Sensors on board include a gyroscope, accelerometer, compass, barometer, GPS, and Galileo support, while motion tracking, optical tracking, a heart rate monitor, an infrared sensor, and ANT+ are all absent. DLNA certification, HDMI output, a built-in projector, crash detection, emergency SOS via satellite, and a stylus are likewise not part of the feature set.

The Sonim XP400 includes a video light to assist with recording in low-light conditions. The display is flat rather than curved, and neither sapphire glass nor an e-paper panel is used.