A mobile electronic device operable with a case, the mobile electronic device comprising: a processor; a plurality of electric-field proximity detectors (202, 204, 206) adapted to detect at least one proximity activator (212, 214, 216) in the case intended for use with the mobile electronic device, the proximity activator(s) (212, 214, 216) being non-magnetic; a component configured to effect setting a state indicator in a device profile in dependence on an output from the electric-field proximity detectors (202, 204, 206), the processor being arranged to: determine which electric-field proximity detectors (202, 204, 206) of the plurality of electric-field proximity detectors (202, 204, 206) in the mobile electronic device detect the presence of a respective proximity activator (212, 214, 216) in the case associated with the mobile electronic device; and set a state indicator to one of a plurality of states in dependence on the determining, wherein when none of the plurality of electric-field proximity detectors (202, 204, 206) detect the presence of the respective proximity activator (212, 214, 216), setting the state indicator to a first state, when at least one, but not all, of the plurality of electric-field proximity detectors (202, 204, 206) detects the presence of the respective proximity activator (212, 214, 216), setting the state indicator to a second state, and when all of the plurality of electric-field proximity detectors (202, 204, 206) detect the presence of the respective proximity activator (212, 214, 216), setting the state indicator to a third state. a processor; a plurality of electric-field proximity detectors (202, 204, 206) adapted to detect at least one proximity activator (212, 214, 216) in the case intended for use with the mobile electronic device, the proximity activator(s) (212, 214, 216) being non-magnetic; a component configured to effect setting a state indicator in a device profile in dependence on an output from the electric-field proximity detectors (202, 204, 206), the processor being arranged to: determine which electric-field proximity detectors (202, 204, 206) of the plurality of electric-field proximity detectors (202, 204, 206) in the mobile electronic device detect the presence of a respective proximity activator (212, 214, 216) in the case associated with the mobile electronic device; and set a state indicator to one of a plurality of states in dependence on the determining, wherein when none of the plurality of electric-field proximity detectors (202, 204, 206) detect the presence of the respective proximity activator (212, 214, 216), setting the state indicator to a first state, when at least one, but not all, of the plurality of electric-field proximity detectors (202, 204, 206) detects the presence of the respective proximity activator (212, 214, 216), setting the state indicator to a second state, and when all of the plurality of electric-field proximity detectors (202, 204, 206) detect the presence of the respective proximity activator (212, 214, 216), setting the state indicator to a third state. determine which electric-field proximity detectors (202, 204, 206) of the plurality of electric-field proximity detectors (202, 204, 206) in the mobile electronic device detect the presence of a respective proximity activator (212, 214, 216) in the case associated with the mobile electronic device; and set a state indicator to one of a plurality of states in dependence on the determining, wherein when none of the plurality of electric-field proximity detectors (202, 204, 206) detect the presence of the respective proximity activator (212, 214, 216), setting the state indicator to a first state, when at least one, but not all, of the plurality of electric-field proximity detectors (202, 204, 206) detects the presence of the respective proximity activator (212, 214, 216), setting the state indicator to a second state, and when all of the plurality of electric-field proximity detectors (202, 204, 206) detect the presence of the respective proximity activator (212, 214, 216), setting the state indicator to a third state. when none of the plurality of electric-field proximity detectors (202, 204, 206) detect the presence of the respective proximity activator (212, 214, 216), setting the state indicator to a first state, when at least one, but not all, of the plurality of electric-field proximity detectors (202, 204, 206) detects the presence of the respective proximity activator (212, 214, 216), setting the state indicator to a second state, and when all of the plurality of electric-field proximity detectors (202, 204, 206) detect the presence of the respective proximity activator (212, 214, 216), setting the state indicator to a third state.