good cover of nokia business opportunities

It is a good read on nokia series 40. After reading the books, I continue to build a set of mobile application for Nokia and Samsung phones at http://www.doitech.com/default_files/super.htm The books provides many useful tips, that has shorten my development time. The application allows user to view their ODBC data at their Nokia and Samsung phone, and sync over GSM/CDMA network. Please visit http://www.doitech.com, if you can find the link. Thank you very much.

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