Damn, I eventually thought that I'm the lucky one cause previously when I was chit chat with my with bluetooth, I didn't really notice bout the sleeping mode problem. Until today, I only realise my mini is still the same like others.
The other party start to 'hello... hello'' and they hung up. So i have to call them back to lie to them is bcos of the telco.

Cannot imagine if they know I'm using a RM2.6k gadget but still have this kind of problem. Hehehe....
I'm yet to installed to patch cause it seem like not so recommended by others. But if there is no choice, I probably will install it cause my career nature oftens need to talk long on the phone. (Will really consider it only if the pro is more than con.)
But, accidently I found out that if the bluetooth went into sleeping mode, it actually can be waken up by pressing the "Call" button once. I tried, and it really resume the conversation. Not sure whether someone else has posted this here, but just to share with others since this is the purpose why we are here.

Sigh, my mini started to lag like nobody business since I keep on upload ringtones and sms+alarm tones into it.

Oh, I figure out that in order to have MP3 as ringtone, the file must be save into Window>Ring, all the while I thought it works the same for sms+alarm tones. But I was wrong. For sms+alarm tones, the files have to be saved under Window folder only. Hope this will help as well.
And huuray, finally I can have a louder alarm tone and my analog clock can be put aside~

hehehe