Portable mobile unit

Portable telephone set for detecting radio wave interference...

Portable telephone set with interference detecting and...

Preventing wireless telecommunications calls from being...

Proactive management of dropped calls in a wireless...

Radio communication apparatus and method for radio...

Radio communication system and reception status display method

Radio range verification method, wireless telecommunications...

Sensor-based augmentation of blockage recovery

Simple technique for detection of physical presence and...

System and method for automatically providing user status in...

System and method for maintaining communication channels...

System and method for using RSSI to invoke features of a...

System and method for warning of and providing greater...

Telephone system having disconnection information outputting fun

Unlicensed wireless communications base station to...

User out-of-range indication for digital wireless systems

Wireless communication apparatus with distinct alarm signals

Wireless communication out of range indication

Wireless intrusion detection system and method