The little Meshtastic node inside of my ThinkPad T420s is surprisingly good (one of the antennas measured quite well for the frequencies used, so I wired it in. I assume it was meant for GNSS? Or UMTS?).

The PCB is a quick custom design I whipped up in EasyEDA to connect an ESP32-S3 with an SX1262 radio chip. It uses the USB pins of the MiniPCIe slot originally intended for a WWAN modem in this laptop :3