The facilities that work in the field of maintenance and repair of mobile phones of various types, which are maintenance, include renewing the condition of the device, such as replacing the phone screen, repairing the transmission antenna, repairing phones that have fallen into water, and replacing damaged parts of the device. These services include the introduction of transmission booster programs, addressing malfunctions related to screen disappearance and decryption of the PIN, modifying the device to comply with the transmission system, adjusting the device, adding musical tunes and other similar services.