How to recognize WiFi from ZTE router/AP?

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http://askubuntu.com – I have a ZTE Wireless router (local provider OTE) and all my devices (Android & Windows) connect to it. My installation of Ubuntu 12.10 on an HP 110 laptop locates all other wifi networks around but not mine. Even on a configured connection it refuses to connect to this wifi network. Any ideas? (HowTos)