The schools making the commitment to a smartphone free childhood for students are Kempsey Primary School, Welland Primary School and Hanley Swan Hanley Castle High School.
Headteachers from the schools in Hanley and Upton Educational Trust have pledged to take steps towards being 'smartphone free'.
A letter has been sent to parents and signed by headteachers Bryony Baynes, Adrian Pratley, Margaret Smith and Mark Stow.
Four headteachers in the Hanley and Upton Educational Trust, Worcestershire have co-signed a letter supporting the "Smartphone Free Childhood" movement which urges delaying smartphone ownership for children.
The heads have pledged to review school policies with the aim of making schools smart phone free spaces for pupils.
The school leaders say: "It is our ambition to promote our own schools as smartphone free spaces. We want to work together across our local area and join those nationally who are already seeing incredible results, to change the "norm" and delay our children having access to smartphones at such a young age."
The letter, which was sent to parents on the same day that Channel 4 released the much anticipated two part documentary 'Swiped, The school that banned smartphones' recognises that smartphones can be helpful pieces of technology, but highlights the increased risks posed to children with an increasing volume of evidence revealing smartphones can cause significant harm to children's wellbeing.
A spokesperson for Worcestershire Smartphone Free Childhood said they were highly addictive, with lasting effects on young and developing brains; linked to poor mental health, depression and low self-esteem, especially in young teens and can expose children to harmful content, including pornography, grooming, bullying and inappropriate material.
Other negative effects cited include reduced attention spans, changing the way children's brains develop and fundamentally affecting their ability to concentrate.
Meanwhile, time spent on a device reduces time spent playing, interacting and developing vital social skills.
Less time on screens has shown to have a positive effect on behaviour in children and teens across the board. According to Ofcom, 84% of bullying in 8 to 17-year-olds is via their phone.
In addition to reviewing their policies, the schools are planning to build educational sessions about this topic into their PSHE curriculum.
In a letter to parents and carers from the Hanley and Upton Educational Trust, school leaders said: "There is a growing movement of parents and schools across the country who are supporting each other to make informed choices in this area.
"This movement towards a "Smartphone Free Childhood" is the subject on a documentary on Channel 4, titled "The School that Banned Smartphones", which will air tonight on December 11 .
"Our school trust is keen to support the "Smartphone Free Childhood" movement in any way we can.
"We are reviewing school policies to ensure we are doing what we can to make our schools smartphone free spaces for our pupils, so that they can focus on learning and socialising, away from the distractions of these devices.
"By "smartphone", we refer to phones that are able to access the Internet, as opposed to mobile phones that can only text and make calls.
"We do understand that many parents will want to contact their child as he/she becomes more independent, particularly when they begin walking to and from school on their own. However, children's phones do not need to be able to access the internet or other apps in order for you to keep them safe and give you peace of mind. When children first started getting smartphones over a decade ago, there was no research about their impact. Now, there is and this research is both overwhelming and alarming."
The letter also says: "We would like to encourage all parents to delay giving children a smartphone until at least the age of 14. We also support raising the minimum age to use social media from 13 to 16 years old.
"Parents can, instead, opt for a text/call phone alternative if necessary. We know that you want the best for your children and that many of you already try to limit your child's access but this is very easy to bypass, and is highly time consuming to monitor."