A mobile-cordless phone system including a mobile-cordless phone assembly; the mobile-cordless phone assembly including an external-phone-body and an internal-circuitry system. The external-phone-body and the internal-circuitry system are structured and arranged to provide the user with a device useful for communications with the internal-circuitry useful for providing a user with a portable telephone with the capabilities to operate on a wireless cellular network and, optionally, a telephone landline. The mobile-cordless phone assembly may be weather-resistant in some embodiments, and may include a multi-color-LED-light-source useful for providing visual indications and notifications to the user. The mobile-cordless phone system includes a solar panel for charging. The mobile-cordless phone assembly may also include a charging-port for connecting a charging-device to the mobile-cordless phone system. Preferred embodiments may also include a fingerprint-reader.