Türk Telekom, TÜBİTAK and Boğaziçi University initiated the "D4R – Data for Refugees Challenge" for improving the living conditions of 3.5 million refugees in Turkey. The challenge targets safety and security, health, education, unemployment, and social integration. It includes analysis of mobility and infrastructure, modeling of refugee dynamics, analysis of the socio-economic needs of refugees, development of new applications and services for the benefit of refugees. The participants will receive an anonymized dataset collected from one million TT customers, and submit research reports at the end of the challenge. More information can be obtained at: http://d4r.turktelekom.com.tr/