Alua Asetkyzy Abzalbek, 14, went to bed listening to music at her village home in Bastobe, Kazakhstan.
The next morning, Alua was found dead, after the phone’s battery exploded close to her head.
Police confirmed that her device had been plugged in to a power socket at the time of her death.
She is believed to have suffered severe head injuries as a result of the blast, and died on the spot.
When paramedics were called by her devastated relatives, they were unable to resuscitate her, saying that she had been dead for some time.
Forensic experts later confirmed that the mobile had exploded in the early hours of the morning after overheating as it charged, and this was the cause of her death, said local reports.
Her passing was described as a “tragic accident”.
The brand of smartphone has not yet been disclosed.
Alua’s distraught best friend Ayazhan Dolasheva, 15, posted on social media: “I still cannot believe it.
“You were the best. We have been together since childhood.
“It is so hard for me without you. I miss you so much.
“You have left me forever.”
Alua’s death follows a string of deaths involving mobile phones in Russia and other countries.
Liliya Novikova, 26 – dubbed Russia’s “most beautiful poker player” – was found dead from a suspected massive electric shock in her bathroom.
She is believed to have been blow drying her hair in the bathroom when an accident occurred although it is also thought she could have been using her mobile at the time.
And earlier this year, an ex-soldier from Britain said the back of his Android handset ‘flew off and caught fire’ when he attempted to manually reset the device.
He was trying to restart his Samsung Galaxy S6 smartphone when it became alight in the palm of his hand.