Tip for travellers: Learn how to set a static IP address on your devices. I've been travelling through South East asia for the last 3 months and at about 20 - 30% of the hotels I stay at the WiFi works fine but their DHCP does not. I presume this is because most routers in default config cache IP address for clients and when they run out of free IP address they just fail to assign new ones to new clients. If you notice the wifi works but your computer or phone times out when connecting set your ip settings as below:

IP Address: 192.168.1.xxx (xxx being between 50 - 200) Netmask: 255.255.255.0 Gateway: 192.168.1.1 DNS: 192.168.1.1

This has worked for me in 90% of cases and you get your own private WiFi (as none of the other guests can access it ;)). There was one place I stayed at in hanoi where I got my own 90Mbps / 40Mbps connection due to nobody else being able to get on.

Sometimes the ip is 192.168.0.xxx and on rare occasions it's been 10.0.0.xxx.

I've tried to help hotels fix this issue as I go but it seems most either get some tech to setup their router or plug it in and keep the default settings (sooo many places have 'admin' as their router password) and don't know how to fix it.