Abstract: Specific ambient and user behaviour sensing systems and methods are presented to improve friendliness and usability of electronic handheld devices, in particular cellular phones, PDAs, multimedia players and similar. The improvements and special functions include following components: a. The keypad is locked/unlocked (disabled/enabled) and/or the display activated based on the device inclination relative to its longitudinal and/or lateral axes. b. The keypad is locked if objects are detected above the display (for example the boundary of a bag or pursue). c. The keypad is locked/unlocked (disabled/enabled) and/or the display activated based on electric field displacement or bio-field sensing systems recognizing the user hand in any position behind the handheld device. d. The electric response signal generated by an electric field through the user hand in contact with a receiver plate is used to identify the user and in negative case lock the device. e.

Abstract: Mobile cellular phone with integrated positioning system and archiving in this way advanced functions based on its location and navigation capabilities. Based on its location and internal consumption statistics can notify the user if the expected battery-level won't be enough for the next period of time outside such location. Based on its location can automatically send predefined or programmed messages (SMS) to defined users. In its internal call log register keeps also the location where the call has been received or done, and can display this back to the user on request. Can encode navigation instructions to the user when walking through mechanic vibration signals.