This step by step tutorial will show you how to configure a #4G mPCIe cellular #modem, and use it as the main internet connection in OpenWRT.

Please note this article assumes that you have OpenWRT already installed. If that's not the case, please start by installing OpenWRT on your #router.
4G hardware compatible with #OpenWRT

The first thing you need to do it to have compatible hardware. There are many #3G, #4G and #LTE modems on the market, but not all of them work well with OpenWRT. Some modems aren't compatible with some motherboards.

https://teklager.se/en/knowledge-base/openwrt-4g-wwan-configuration/

OpenWRT 4G WWAN configuration

How to configure a 4G/LTE WWAN connection in OpenWRT. Easy step by step tutorial.

^teklager.se