i have a T100 and my country does sell T400. i have checked it out. Let me tell you, T400 has more colours than T100(64,000 vs 4096). It is smaller than T100 and yes it has a better quality ring tones. It has longer talking hours than T100. The phone sounds really good,right? Well. I did plan to get it but it looks cheap and bulky. If you don't mind it, go for it. as for a program to convert
midi file to mmf try this website
http://fp.freefonefun.plus.com/t100vibration.htm