The present teachings relate to a wireless communications, data, and multimedia device that can utilize various service, media, and channels including, for example, cellular radio frequency, wireless hotspot 802.11x radio frequencies, HD radio frequency, and BLUETOOTH.RTM. radio frequency, all in an integrated device. The present teachings further provide a Cellular Notebook device featuring a keypad comprising both a QWERTY keyboard and a telephony keypad. The present teachings provide for broadband data service via a primary link using cellular radio frequency data services, and optionally 802.11x hotspot data connections to the Internet. The Cellular Notebook can utilize flash memory, USB, and BLUETOOTH.RTM. data and memory storage components only. The Cellular Notebook according to the present teachings can provide the user with network specific-content and serve as an integrated device that empowers the user in an emergency situation like no previously available device.

 
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> Apparatus and method for exchanging variable-length data according to radio link protocol in mobile communication system

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