Retailing and wholesaling of telecommunication apparatus and services; management of business affairs for wholesalers and retailers, provision of services relating to the guarantee of transactions, accounting, negotiation of price and discounts, issuing invoices, delivery of goods, management and signing of contracts, distribution channels management, credit evaluation, sales tracking and tracing, sales analysis, payment control and management stocks control and management, import and export control and management, locating ,tracking and management of freight and cargo ,handling of damaged and lost products and insurance management, treasury management,after sale repair and maintenance services and ordering of products or services; organizations of auctions; advertising and marketing services for others; dissemination or updating of advertising materials; promotional services; organization of exhibitions of products for commercial or advertising purposes; publication of publicity texts; marketing research and marketing studfies; provision of business