Purpose of study: Early CPR through the use of telephone CPR has been identified as an important factor in the strengthening chain of survival. 1 2012 AHA Scientific Statement, Emergency Medical Service Dispatch Cardiopulmonary ResuscitationPre-arrival Instructions to Improve Survival From Out-of-Hospital Cardiac Arrest. Circulation. 2012; 125: 648-655 Crossref PubMed Scopus (159) Google Scholar To initiate t-CPR the caller must first be beside the patient. This study examined if callers were with the patient at the time of making the call. The use of mobile phones has the advantage over fixed line phones, by allowing the caller to be close to the patient therefore increasing the reliability of the information about the patient's condition.