In light of rapid digital transformation and the increasing reliance on telecommunications networks for daily activities, subscribers’ data has become one of the most valuable assets that must be legally and technically protected. Telecommunications service providers are not only responsible for delivering communication services, but they are also legally obligated to safeguard users’ privacy and ensure the confidentiality of their personal information. The legal responsibility of service providers includes adopting appropriate technical and administrative measures to protect data from breaches, leaks, or unauthorized use. Such measures involve implementing encryption systems, securing databases, and establishing clear privacy policies. Providers are also required not to disclose subscribers’ data except in cases permitted by law and based on competent judicial orders. At the international level, various legal frameworks emphasize the importance of data protection, including the Budapest Convention on Cybercrime, which promotes international cooperation in combating cybercrime and protecting digital information. In addition, the International Telecommunication Union supports regulatory efforts to enhance cybersecurity and strengthen the protection of telecommunications infrastructure worldwide. Failure to comply with these obligations may result in civil liability, such as compensation for damages, administrative penalties including fines, and in certain cases, criminal liability where gross negligence or intentional misconduct is proven. Strengthening the protection of subscribers’ data requires strict legal compliance by telecommunications providers, effective regulatory oversight, and increased public awareness of privacy rights, all of which contribute to building a secure and trustworthy digital environment.