Yes iOS (iPhone) devices can detect and show all (iOS and non-iOS) devices near them that can be detected. IOS devices will also connect and connect / interact with all devices (except iOS) that support the corresponding profiles supported by iOS, such as headsets for voice, stereo music, Bluetooth wireless keyboards, mice, etc. The following is a list of supported iOS profiles - http://support.apple.com/kb/ht3647
MFi (Made for iPhone / iPad / iPod) is specific only to accessories that connect to iOS devices via bluetooth, but not using standard profiles. (Either because standard profiles do not allow use-case, or because it uses a common profile, such as SPP, to communicate with a specific application on an iOS device)
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