A method for introducing a replacement code segment over-the-air through a wireless mobile communication network to an existing code resident on a mobile terminal: identifying the mobile terminal from among terminals served through the wireless mobile communication network; sending a push notification through the network to the mobile terminal, the push notification indicative of the replacement code segment ready for downloading; activating a dynamic update module resident in the mobile terminal, in response to the push notification; sending a request for the replacement code segment; downloading the replacement code segment to the mobile terminal; and transferring the downloaded replacement code segment to the dynamic update module for dynamic replacement of a corresponding old code segment within the mobile terminal with the replacement code segment, obviating a need to recompile the existing code.