The phone is equipped with two Nano SIM slots, both of which can be used simultaneously, or one SIM can be used with a MicroSD memory card. It supports 2G, 3G, 4G, and 5G communication networks. The phone comes with an IPS LCD screen, 6.9 inches in size, with a resolution of 1080×2340 pixels +FHD and a pixel density of 374 pixels per inch. The screen supports a 144Hz refresh rate, 850 nits brightness, and is protected by a layer of Gorilla Glass 3. The Redmi 15 5G phone comes with a Qualcomm Snapdragon 6s Gen 3 octa-core processor, divided into two cores at 2.3 GHz and six cores at 2.0 GHz, with an Adreno 619 graphics processor, and manufactured using a 6nm process. It comes with 256GB of UFS 2.2 storage and 8GB of LPDDR4x RAM. The device supports expanding external storage via a MicroSD card. The phone's operating system is Android 15 with the HyperOS 2 user interface. The phone comes with a dual rear camera. The main camera has a resolution of 50 megapixels and an f/1.8 aperture, and the second camera has a resolution of 0.3 megapixels, used only for aesthetic enhancement of the device's appearance without any practical function. The camera supports Auto Focus and FHD video recording at 30 frames per second. The front camera has a resolution of 8 megapixels with an f/2.0 aperture and supports FHD video recording at 30 frames per second. The battery is a silicon-carbon type with a capacity of 7000 mAh and supports 33W fast charging. The phone has a single Mono speaker that supports Hi-Res audio technology and Dolby Atmos, but it does not have a 3.5mm headphone jack. It supports Wi-Fi version 5 with frequencies a/b/g/n/ac and supports Dual-band and Hotspot features. Bluetooth is available in version 5.1 with support for LE and A2DP. The phone comes with a USB Type-C version 2.0 port, which supports OTG. The Redmi 15 5G device supports GPS with support for other positioning systems like GLONASS, GALILEO, and BeiDou. The device supports the IR Blaster feature for controlling home appliances via infrared. It also supports NFC near-field communication technology. However, this technology may not be available in all markets, as its availability varies from market to market. The device comes with accelerometer, compass, and proximity (software) sensors. It is equipped with a fingerprint sensor located in the power button on the side of the device, and supports Face Unlock technology.