Canadian national Tatiana Dokhotaru, 34, was found dead in her unit at Liverpool, in Sydney's southwest, on the evening of Saturday, May 27.
Ms Dokhotaru's partner Danny Zayat was found with her body and was later charged with 22 domestic violence-related offences.
On Monday, the 28-year-old St Clair man was arrested and charged with her murder.
He was refused bail ahead of a court appearance in Penrith.
A court heard in July the pair were in a relationship for five years, but in May 2022 Ms Dokhotaru took out an apprehended violence order against him.
On May 26 this year, Zayat smashed Ms Dokhotaru's television, causing her to ring triple-zero, but police were unable to locate which apartment in the Liverpool apartment tower the call was coming from, the court was told.
"He's bashing me," she allegedly told the operator during the call.
Police allege the call ended abruptly when Ms Dokhotaru's phone was hurled out of the apartment window.
Investigators previously appealed for public help in recovering the device.
Zayat's lawyer previously described the couple's relationship as turbulent and toxic, but he said his client had been heard running through the hallway of the Liverpool block shouting "help me" around the time of Ms Dokhotaru's death.
He also called triple-zero and police observed him in extreme distress when they arrived at the scene, the Supreme Court heard last month.
A separate internal police investigation is looking into all other circumstances surrounding the triple-zero call and subsequent death of Ms Dokhotaru.
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