10 year old girl suicide in virginia in US . Mother urges parents to keep smartphones out of children's reach .

A 10 year old girl died by suicide exacerbated by cyberbullying in US .

The grieving mother believes her daughter's late night use of smartphone use in bed played critical role .

Turning personal tragedy into a nationwide warning urging parents to rethink the role of smartphones in their children's lives . 

Summer Bushman from Virginia  US , lost her 10 year old daughter earlier this year after month of bullying both in person and online .