Can my mobile (cell) phone replace Lucha T8, since I can install an application that generates Schumann frequency?

The simple answer is no. There are several reasons why the frequency and the signal generated by mobile phone and Lucha T8 are different. The human audible range depends on the pitch and loudness of the sound. Pitch is measured in Hertz (Hz) and loudness is measured in decibels (dB). As far as loudness is concerned, people can typically hear starting at 0 dB. The lowest audible pitch is, assuming perfect hearing, around 20 Hz. Schumann frequency is beyond human audible recognition since it’s frequency (7.83 Hz) is beyond hearing threshold. The applications for mobile phones through the wave generator contained in the application generate “very similar but audible tone”. Whatever “very similar” in the description of the application means, the sound generated by the mobile device does not match the frequency of the Schumann resonance since it is audible. Also, cellular frequencies of the electromagnetic waves reaching cell phones, are typically in the range 800 MHz – 1300 MHz, and these waves of much larger power interfere with the frequencies generated by the internal frequency generator of the application, and thus modulate them. Finally, the characteristic feature of the Lucha T8 device is that the Schumann frequency is transmitted to the body by means of red light.