The invention relates to a 
system, enabling subscribers of a 
wireless Telecom Operator to execute financial transactions with a 
mobile phone, or an electronic device which can be connected to the 
wireless communication network, wherein a subscriber has one or several 
Financial Transaction Accounts open and managed by the Telecom Operator, which can receive monetary deposits, and on which debit and credit operations can be executed. The 
system is composed of a 
Transaction Processing Platform, which is installed on the computers of the Telecom Operator, is connected to the 
wireless communication network, is interfaced with other elements of the Telecom Operator, manages the Financial Transactions Accounts, verifies / executes financial transactions sent by the subscribers, and executes other tasks like confirmations of transactions, account statement preparation, reporting, etc. The 
system is also composed of a 
client software that runs on the 
Mobile Phone of the subscriber or his connectable electronic device or on the Subscriber Identify Module which is inserted in the 
mobile phone or connectable electronic device. Such 
client software enables the subscriber to prepare, validate and send through the wireless communication network, transactions orders to the 
Transaction Processing Platform.