Cradlepoint released a new M2M gateway that will be available soon, the IBR350. This is a non-rugged indoor device, with a plastic enclosure. It is primarily targeted at ATMs, Kiosks, digital signs, and telemetry applications. Because its non-rugged, its meant for indoor stationary use only. Vehicles and mobile applications should still use the IBR600/650.
The CradlePoint COR IBR350 is also 4G LTE ONLY. There is no 3G fall back. There is also only 1 ethernet port for a wired LAN device. No WiFi, and no WAN port for a wired connection. That in mind, this is also a much lower cost device than a 600/650