This study addresses the legal system of mobile contract. It aims to determine the concept mobile contract, its characteristics and identify the contractors. Also it aims to achieve the right legal nature of mobile contract. And to determine the effects of this contract for the contractors which represented in contract companies commitments and joint. Because mobile contract is a type of contemporary compliance contracts which companies unique wording the contract and putting the terms without discussing the joint, so this study focus on determining the foundations of the contract responsibility, its effects and the possibility of changing the provision. There are many results for this study, the most important are: 1. There is a big disparity between contractors of mobile contract from the economical, legal and technical views, so that why the contact companies control the most vitality sectors in the country exploiting its monopoly of the contracts services and people need. 2. The right legal nature of mobile contract is to be supply contract , analogy the other services like water and electricity and because the same contract characteristics and provisions. 3. Is being held responsible for telecommunications companies as a result of a breach of its obligations, but it is typically exclude responsibility under contractual conditions, does not know the joint, and if aware of them do not have the refusal; the fact that the contract of adhesion contracts; therefore we consider this arbitrary conditions, and then it can be for the judge to estimate revoked.