Police hope to secure an agreement with the FBI to back their request for Apple to unlock the athlete's iPhone so its content can be analysed and presented in court, according to South Africa's Eyewitness News. The trial is due to start on 3 March.
Investigators need Apple to unlock the encrypted data on the phone because the Olympian can't remember his Apple ID code needed to access his messages. It is understood that the FBI must approve the request before Apple can be contacted for information.
Prosecutors said two iPhones and two BlackBerrys were found on the bathroom floor of Pistorius' villa in Pretoria where his girlfriend, Reeva Steenkamp, 29, was shot dead on Valentine's Day last year.
Police Commissioner Lesetja Mothiba said he is confident of the prosecution case.
"In terms of all the loose strings, we’ve tied them up and our witnesses are ready," he told Eyewitness News "All our exhibits are ready and we are very much convinced that we have a strong case against Oscar Pistorius."
Steenkamp's parents, June and Barry, said the family is looking for closure and confirmed Reeva's mother will attend the trial in Pretoria next month.
In a statement, they said: "All we are looking for is closure and to know that our daughter did not suffer on that tragic Valentine's Day.
More than 100 witnesses are expected to appear in court; including Pistorius' sister, Aimee, former girlfriends Melissa Rom and Samantha Taylor, residents of gated community Silver Woods in Pretoria and a team of medical, paramedics, ballistic and forensic experts