Of course the songs will be different in MIDI because the samples used are fetched from your sound card! And the MIDI used in mobile phones are different from the one used in PC:s, too (fewer instruments and notes range).
If you can and have the time, just remake them in your cell phone. That's what I do. Got quite a collection of MIDI remix tunes and covers in it by now, hehe. 8-)
Oh, when I think about, if you want some MIDI tunes from me, just ask. I'm happy to share them (some are my own songs - MOD covers and originals).