Most of the earphones of some brands like lenovo, samsung, sony, skullcandy etc. are not compatible with my canvas A093(Fire-yeah its history). So i figured that(not confirmed tho) the jack must be an OMTP standardized one. Is it so??? If it is OMTP, which earphones can i use with it, like those of ATH/Brainwavz/Sennheiser. HAAALP