This dirt cheap 4G LTE modem on a USB stick can be hacked to run mainline Linux - Liliputing
Console based Huawei Mini PCIe modem 4G connection with LES v3 under Debian - Thomas-Krenn-Wiki-en
wireless/modem – Gateworks
Mobile Recharging Cinterion TC35I USB 32 Port GSM Modem Pool Bulk SMS Sending for SMS Marketing (Support Linux) - China 32 Port Modem and Gsm Modem price | Made-in-China.com
Sharing internet from SIM7600 4G-GSM Modem | Random Codes - Elementz Tech Blog
new product Linux support gsm modem pool TCP IP GPRS gps gprs rs232 - AliExpress
Balance of GSM USB Modem using USSD - Ask Ubuntu
Modem Manager GUI: Linux Mobile Partner Application For USB Modems | Unixmen