Is there some device/setting where i go to some place where there is an existing WLAN. I would then connect some WLAN router/special device to that WLAN to gain internet access. Now i want that device to create another WLAN to which my other devices can connect. Thus i could setup my devices to connect to my WLAN router/device and only that device would need to connect to the existing other device.
In best case as a fallback some 3G card/umts stick could be used in that device as well.
//Edit: adding some information about use case. I have multiple devices. I want to connect them only once - to my WLAN router. That router would handle to go to the internet. And in most of my cases that internet is available via WLAN. As there are a bunch of devices i want to avoid to enter the credentials into all of them.
As for operating system - the devices are a mix of ios, android and windows phone. I would have some laptop with Windows 7/8.