Public hotspots usually don't use encryption, AFAIK. This means wpa_supplicant is not needed.
But, a look at their website shows:
Quote:
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SECURE - With the latest T-Mobile Connection Manager software, the data between your device and the access point is encrypted, further reducing the risk that your session may be observed.
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...running under Windows, no doubt.
The most important information in config file for wpa_supplicant are the name of the access point (essid) and the key. Without this info you can not connect.
