Infinix Hot 40i features a 6.56-inch HD+ display with a refresh rate of 90Hz. The phone is powered by a MediaTek Helio G88 SoC paired with up to 16GB of RAM including vRAM and up to 128GB of inbuilt storage. It also ships with Android 13 out-of-the-box.

For optics, the Infinix Hot 40i features a 50-megapixel primary sensor and an unspecified secondary sensor at the back alongside a ring LED flashlight. These three units are arranged in three separate circular slots within a slightly raised rectangular camera module on the top left corner of the back panel. The front camera is placed within a centred hole-punch cutout at the top of the display. It comes with a 32-megapixel sensor.

The Infinix Hot 40i packs a 5,000mAh battery with 18W wired charging support. For security, the phone comes with a side-mounted fingerprint sensor, which is likely placed on the power button on the right edge of the handset.