The HUAWEI CDMA Handset - Application Interface Windows driver refers to the software that enables communication between a HUAWEI CDMA (Code Division Multiple Access) handset (usually a mobile phone or USB modem) and a Windows PC. This driver facilitates data exchange, such as transferring files, using the handset as a modem for internet connectivity, or managing the phone through software on your PC.

In many cases, this driver is used for devices like HUAWEI USB modems or mobile hotspots that operate on CDMA networks (common in some regions, especially for older 3G/4G networks). The "Application Interface" part of the name suggests that the driver also enables applications (like HUAWEI's Mobile Partner software) to interact with the phone for managing messages, calls, internet settings, and more.