Vodacom forensic expert Petro Heyneke said phone records showed that Xolile Mngeni's sim card was picked up transmitting from Zola Tonga's Nokia E90 phone at 9.03am on November 14 2010.

She said the card was first placed in the phone at 8.47am.

The phone activity was picked up by a Khayelitsha signal mast.

Mngeni, 25, has pleaded not guilty to hijacking, robbing and killing Dewani in Gugulethu on November 13 2010.

Heyneke said the last activity on Tongo's phone was an incoming call at 10.53pm, the night Dewani was killed.

The phone number was not available until 4pm the next day.

"At 5.13pm [on November 14], a new sim card was issued [and] the user did a sim swap. The sim card was placed in a new handset."

The new sim card was in use until November 25 that year. The court heard phone evidence relating to a hotel receptionist, who allegedly acted as the middleman in the murder.

Heyneke said several calls were made between the receptionist's phone number and Mziwamadoda Qwabe, who was jailed for 25 years for his role in the murder.

She said calls between the two numbers were logged at 7.30pm, 7.36pm and 7.37pm on November 12 2010.

On the day of the murder, the receptionist received a call at 10.34am.

The next day, a call was made from the receptionist's phone number to Tongo's number at about 10.21am.

Prosecutor Shareen Riley said the relevance of the raw phone data would be put into context by a crime mapper, who would show the links between suspects, locations and events.