| 摘要 |
When a wireless communications device is traveling at a speed exceeding a lower threshold but less than an upper threshold, the device is presumed to be traveling in a motor vehicle. In order to inhibit operation of the wireless communication device by a driver without restricting operation by a passenger, access to certain device functions or applications such as e-mail, text messaging, etc. are limited by challenging the user of the device to respond to an ergonomic challenge that requires two-handed user input. Only if two-handed input is received will the wireless communications device grant access to e-mail or instant messaging.
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