Spectrum sharing is new veracity for spectrum user. The success of broadband and wireless data services needs more spectrums that led to alliance over the past few years on how government and industry might share spectrum. In this paper, the authors have discussed the problems of wireless/mobile networks operating on same frequency bands and also they have discussed the policies that can enable the use of many spectrums sharing provision. These policies will make them to recognize the challenges and problems associated with spectrum efficiency. Success and competence of spectrum sharing depends on the type of system involved.