The TOBY-L2 a u-blox LTE module has been embedded in the first 4G LTE Maker Modem by M2M Circuits. Designed for the MakerSpace, the 4G Maker Modem enables direct cellular connection to microcontrollers and SBCs for M2M applications. In addition to offering high-speed TCP/IP over the LTE network for higher data-rate M2M applications and broader coverage, the Maker Modem is also set up for SMS and communication via text messages. Due to its open-source API, you can use your favorite SBCs and microcontrollers. The modem also includes a built-in antenna system and two data-port connections (USB connection and two-wire serial interface for low-power microcontrollers).
The Maker Modem is looking to be certified in the US. For more information, check out the Kickstarter video.