This hack provides some useful issues, for example we can read books at night using our old lovely retro phone, meanwhile using the phone as a mobile or any cell phone audio amplifier, the quality of the amplified songs would be depending on what type of amplifier you will use inside the retro-phone. Usually strong amps which are bigger in size cannot be fit inside the phone, but small ones are getting into.
I used an amplifier taken from a SONY cassette player 3V stereo.
I hope you like this project also visit my channel for my hack and how to projects here:
the music is from stockmusic.net.
a royalty free track, which I have purchased the license for Samimy-productions.