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The telecommunication facilities are normally not available in flood and earthquake effected areas. Under such circumstances, telecommunication company free (telecofree) and simfree communication is required which can work in all situations (independent of telecommunication companies). In this research work, Subscriber Identity Module (simfree) communication was done by using raspberry pi B+ as base station. The device was operated at 2.4 GHz frequencies using Wi-Fi enabled android mobile phones. The android devices were connected with centralized mini base station. The base-station did the user authentication to communicate in between two devices and for conference call services. The base station provided the facility for communicating the text, voice and video data in between the android cell phones without using any SIM. This research helped in designing and implementing the future adhoc networks for the military communication and disaster mitigation.