Comments: Teardown: DDC Mobile X900
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You're misidentified SOT23-6 part which is marked as 8205. This is dual N-Ch MOSFET like this one: http://www.stansontech.com/download/Trench%20MosFet/STN8205D_v1.pdf Lots of manufacturers making them, ranging from 3 to 6A continuous drain capacity. S8205 you're referring to has 16 leads...
The battery was expected, the bold claims were expected, but I have to admit I did not expect that big of a speaker, nor the ingenious (albeit completely "Oh, China.") double keypad solution :)
Of course one question is: what did you pay for it? (the usual web markets list it for around $45)
Remember this is me, walking up to a random cell phone booth in the market with wide stary eyes and negotiating (poorly) through a calculator. They charged me 175RMB or about $28. I bet the going rate is more like $15 to $20.
looks like aliexpress has them for $50/ea with free shipping. different brand on them though...
http://www.aliexpress.com/item/Luxury-Mobile-Phone-X900-Flashlight-Loud-Speaker-2-0-Color-Screen-Camera-Bluetooth-MP3-MP4-FM/1262109605.html?af=ppc&isdl=y&src=Google&albch=Google&albcp=Search_Search-ALL-PLA&albkw=None_US-Shopping-Search-Product-AliExpress_none_none&albag=home_none_Search-ALL-PLA_1013999999870&albmt=broad&albst=search-text&albom=OTHERS_None_20130807_Aliexpress&creative=31447451305&ptsid=1013999999870&gclid=CPXNqJjK4b4CFUZp7AoddQgAsQ