Asked to rate various wireless features, wireless users ranked the ability to automatically notify the carrier of service problems the highest (7.4/10), followed by the ability to change phones and keep ring tones/settings (6.4/10), self-manage wireless set-up (6.0/10), and easily transfer speed dials from phone to phone (5.8/10). The SIM card plays the dual role of representing the service operator in the hands of the subscriber, as well as identifying the subscriber onto the wireless network. This characteristic allows the subscriber to move the SIM from phone to phone, which speeds the introduction of new phones and new services.
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