What wireless cards and USB broadband modems are supported on firewalls and access points?

The latest version of SonicOS firmware provides support for a wide variety of USB and Hotspot devices and wireless service providers as listed below.

Broadband Devices

¹ Cellular network operators around the world are announcing their plans to discontinue 3G services starting as early as December 2020.  Therefore LTE or 5G WWAN devices should be used for new deployments.  Existing deployments with 3G should be upgraded soon to LTE or 5G in preparation for the imminent discontinuation of 3G services.
² Refer to AT&T 340U article for more info
³ Multiple variations of the Huawei card: E8371h-153, E8372h-155, & E8372h-510
⁴ Huawei Modem 3372h and 3372s have been released by Huawei in multiple variants (i.e. -608, -153, -607, -517, -511) and with different protocols. At the moment, SonicOS does not support Huawei Proprietary protocol so all the variants using a non-standard or proprietary protocol are not supported or require the ISP to provide a PPP APN Type.
⁵ Huawei Modem E353 is not compatible with SOHO 250. Also note that it is not an LTE card
⁶ For customers outside of the 90-day warranty support period, an active SonicWall 8x5 or 24x7 Dynamic Support agreement allows you to keep your network security up-to-date by providing access to the latest firmware updates. You can manage all services including Dynamic Support and firmware downloads on any of your registered appliances at mysonicwall.com.