Using ThinkPad T480 as a mobile phone

A ThinkPad T480 laptop can be converted into a fully functional mobile phone supporting calls, SMS, and mobile data by replacing its firmware with Libreboot and installing a Quectel EG25-G modem with custom firmware that registers as a USB audio interface. While the process requires technical modifications including antenna conversion cables, it enables users to consolidate their devices by using only a laptop for phone functionality, with additional Android app support available through Waydroid.