I'm considering a mobile wlan router to buy, but do not know which one to take. He should have a LAN output for e.g. A laptop without wireless internet and an entrance for hotel rooms etc. Have. In addition, you should be able to use it with a SIM card on the way.
Take a look at the models of GLI.Net, because you will certainly find something. If you choose a model with a USB port, you can also connect a surfstick there. In addition, OpenWRT runs on it… What more do you want?
https://www.gl-inet.com/