Need explanation of various camera capture mode on android smartphone?

I just bought Lenovo A859 (with Android 4.2). I notice that the camera has several capture mode, like:
-Normal
-HDR
-Face Beauty
-Panorama
-M.A.V.
-Auto scene detect
-Smile shot
-Best shot
-EV bracket shot

I can only use several of them since they are pretty cut and clear use. But I don't know the rest like how are they different or how they are best utilized. I've been looking on internet for sometime but can't help a good answer. Can someone please help me?

Added (1). After several hours messing around with the camera, I think I get some of the modes, but still don't know the following:
-HDR: I need to hold the camera steady for several seconds but I don't notice any different from the pic taken.
-Auto Scene and Best shot: Just point and shoot, but again, I notice no difference from the pic taken.
-Face Beauty: from the name I presume it's for taking people pics and makes them more beautiful (w/o photoshop), haven't tried it on people though…

Guest

Make note that Lenovo does not have a manual that explains the modes. The next time you buy, I would look for a product that does have decent documentation. I went to their site and they have a quick guide and several regulatory manuals but nothing useful for learning their product.

I'll take my best guess:

Normal - just point and shoot; snapshots

HDR - It should bracket the shot and combine it into one pic; the purpose is to make pix of extreme exposures, like you get in bright sunshine, when some things are blown out (glare) and some things are too dark (shadows).

Panorama - takes several pix in a horizontal line, combines them into one wide pic. Problem here is that there's at least two ways to do this. Some cameras allow you to scan the scene in one shot, others require you to take a series of overlapping pix that they then combine.

M.A.V. - ? It may be a game

Auto scene detect - the camera analysis the scene and picks the best settings for it.

Smile shot - probably waits for your subject to smile

Best shot - takes multiple pix and chooses the best one; handy for low light shots

EV bracket shot - probably takes three shots, one underexposed, one overexposed and one properly exposed. You are supposed to combine them on your computer; a manual way of doing HDR

Those are my best guesses.

retiredPhil