GNU/Linux Debian Buster Installing MediaTek MT7603e/MT7603en Driver Guide
Hello Linux user! This tutorial will guide you step-by-step on How to Install Ralink/MediaTek MT7603e/MT7603en Wireless Driver in Debian Buster 10.x GNU/Linux.
And to make use of the Latest MediaTek MT76 Driver on Debian Buster it’s enough to dispose of an Updated Linux Kernel.
After a Kernel Upgrade, it is Strongly Recommended to Immediately Proceed with a Firmware Update to Ensure Hardware Compatibility and Optimal Performance. Follow this Guide: How to Update Linux Firmware on GNU/Linux Distros.
Especially relevant: this Driver is supplied from Linux 4.19 but some important Connection Issues has been fixed only starting from the 5.4.1 Kernel release.
Again some of the Latest MediaTek Chipsets are supported only in a range of New Kernels. So Check the List here below for more insight!

How to Install MediaTek MT7603e/MT7603en Driver in Debian Buster