Mobile phone penetrations have increased in Turkey in recent years, as well as in the world. As a result of that operations and businesses on mobile environments have also rised. Trust to those environments and securing information on those have become important. In order to cover this expectation, in this study, mobile electronic signature (me-sign) technologies were revised, the models used for infrastructures and the applications in the world used in these infrastructures were reviewed. Implementing me-sign in Turkey is discussed. Finally, a number of issues were suggested for me-sign applications and regulations in Turkey.