There is on this site a really competent developer who knows how to permanently disable the Earpiece speaker with a kernel script/module? (I use Kernel Adiutor, but I'm a chemist not a developer, so much I won't be able to do hahahahaha)
My device (which I imagine is irrelevant): Motorola MXP(lux), with custom 3.10.49 kernel.
I'm not interested in an application (I've tried them all), I can't change the earpiece and I don't have enough money to update my phone.
Thanks in advance and a warm hug from the end of the world!