option (kernel module) + cdc_acm or cdc_ether
Huawei_E303_Driver.zip (or part of Mobile Partner suite) huawei e303 driver
1. Executive Summary The Huawei E303 is a popular 3G USB modem (often labeled a "data card" or "dongle") released around 2011–2013. It supports HSPA+ (21.6 Mbps downlink) and is primarily used for mobile broadband connectivity. The driver situation for the E303 is unique because the device uses Zero-CD (or "mode-switching") technology: it initially appears as a virtual CD-ROM containing drivers and a connection manager (Mobile Partner), then switches to modem mode once drivers are installed. huawei e303 driver