More phone data information relating Christchurch real estate agent Yanfei Bao is expected to be revealed in court today

Tinjun Cao is on trial for her murder, and is now conducting his own defence.

Yesterday, the jury heard Bao and Cao's phones were in the same vicinity for up to six hours around the time she disappeared.

It's understood Bao's phone was only able to be fully unlocked by Police this year, helping lead to her discovery.