Vile Rosalin Baker, 25 and her partner Jeffrey Wiltshire, 52, have been convicted of causing or allowing baby Imani Wiltshire’s death but cleared of murder.
Tragic Imani was found to have multiple injuries – including 40 rib fractures, a broken wrist and fractured skull.
Her wounds were caused by twisting or pulling her arm, squeezing her chest and throwing her against a hard surface, the Old Bailey heard.
During the journey, Baker sat texting for around 20 minutes remaining "cold and calm" as frantic passengers tried saving her daughter's life when she raised the alarm.
In a chilling 999 call released by police, one witness can be heard telling the operator the tot wasn't breathing not knowing the child had been dead for hours.
Call records later showed Baker sent her sister a text message which read "Imani is dead sis x".
She claimed Wiltshire had caused the child's catastrophic injuries before forcing her to get on the bus in a bid to frame her.
But Wiltshire denied ever being violent to towards any of his 25 children - two of whom have died - or the 18 women who gave birth to them and said he had no idea how Imani had been killed.
A jury of eight woman and three men today acquitted the pair of murder after 14 hours and 28 minutes of deliberations, but found them guilty of causing or allowing the death of a child.
In court, she blamed her boyfriend for Imani's death, telling jurors he had also undressed the dead baby, changed her nappy and put her in new clothes.
They then hatched a ruse to cover up the tot's death by pretending she had fallen ill on the bus.
After she was taken to hospital, medics discovered the tragic baby was cold to the touch and that onset of Rigor Mortis had begun.