We recommend sticking to channels 1, 6 or 11 with 2.4 GHz to achieve the best stability, and for all devices to be able to find the wireless network regardless where and when they were manufactured. It is common to adhere to these three channels, although in Norway you can theoretically use all channels from 1 to 13.
If you find that the Wifi speed where you are is just too slow to perform what you need, then your only other real choice might be to consider a mobile hotspot as these create an Internet connection. However, these are more expensive and rely on a mobile network, so best to see if you can get things to work with the travel router if you can since there is an existing connection where you are.
Most travel routers offer speeds in the region of 300Mbps, which is more than fast enough for streaming even very high definition content, and faster than most networks. So I think that no travel router will really improve that speed so any of them will pretty much give you the same speed. The only option would be to invest in a mobile hotspot, which bypasses the wifi entirely and connects over a 4G network which could deliver faster speeds. If these are available in the country you are traveling in, they can be faster than WiFi in some cases.
Yes, so travel router devices can either extend an ethernet network into a WiFi network, or extend a weak WiFi signal into something your devices can connect to. Of course this only works if there is a wifi connection to extend.
Note that in some areas, there are so many wireless networks using all kinds of channels that it's impossible to choose a channel that doesn't overlap any others. You may find, for example, that some routers around you are using channels 2, 3, 4 and 5, as well as 1. In this case, you'll need to pick a channel that doesn't overlap the most congested area, so channel 11 in this example. Ultimately, with so many wireless networks around, you may just have to pick the channel that gives you the best result, regardless of the consequences for other people.
Installing software tools on Linux always takes a bit more effort compared to Windows and Mac. So, I recommend using the Terminal utility to scan for the best WiFi network channel in your area. 2b1af7f3a8