Portable electronic device having interchangeable user interfaces and method thereof

A method comprising:

• determining that a first touch-sensitive screen technology sub-system for a touch-sensitive screen of a portable electronic device is active while a second touch-sensitive screen technology sub-system for the touch-sensitive screen of the portable electronic device is inactive;
• detecting a predetermined environmental condition by at least one sensor of the portable electronic device;
• and
• activating the second touch-sensitive screen technology sub-system of the portable electronic device and deactivating the first touch-sensitive screen technology sub-system of the portable electronic device in response to detecting the predetermined environmental condition by the at least one sensor, wherein the second touch-sensitive screen technology sub-system provides a different sensitivity level than the first touch-sensitive screen technology sub-system under the predetermined environmental condition.

A method comprising:

• activating a first touch-sensitive screen technology sub-system of a touch-sensitive screen of a portable electronic device while a second touch-sensitive screen technology sub-system for the touch-sensitive screen of the portable electronic device is inactive;
• detecting an energy level of a power source of the portable electronic device;
• and
• activating the second touch-sensitive user interface of the portable electronic device and deactivating the first touch-sensitive screen technology sub-system of the portable electronic device in response to determining that the energy level of the power source is below a threshold level of energy, wherein the second touch-sensitive screen technology sub-system requires less power than the first touch-sensitive screen technology sub-system.