Before diving into downloads, it is vital to understand exactly what hardware you possess. The is a USB modem stick, typically branded by mobile network operators (such as Vodafone, TalkTalk, or other regional carriers). While the hardware is manufactured by Huawei, the firmware inside is often customized by the carrier.
Without these drivers:
⚠️ Windows 7 does not automatically install drivers for the K3772-z via Windows Update. Manual intervention is required. K3772-z Driver Download Windows 7