The is an entry-level octa-core chipset commonly used in budget-friendly smartphones from brands like Itel , Tecno , Infinix , and Realme . When these devices experience "Invalid IMEI" or "Null IMEI" errors—often caused by corrupted NVRAM or firmware updates—they lose the ability to connect to cellular networks.

: This is the most common utility for repairing or writing IMEI on UNISOC/Spreadtrum devices. It is a lightweight Windows application that supports multiple IMEI writing for dual-SIM devices.