I live in South-East Asia and I connect through my glinet router to other networks: https://www.gl-inet.com/products/gl-axt1800/ It runs with openwrt and a customized UI available. Depending on the country though, it can be hard to connect. Typically in Japan ISPs use a specific way (called DS-Lite) to connect from ipv4 to ipv6 networks and the implementation in openwrt has almost never been tested. In other countries it works well, I use it from a LAN port or as relay. In retrospective I should have spent more money on a router to get better coverage through walls.