What Age Should a Child Get Their First Phone? What a Study of 10,588 Children Found
Barzilay et al. · Pediatrics, 2026 · Topics: Phones & Screens
⚠ General information only — this page explains one study and isn't medical or parenting advice for your specific child.
TL;DR: No study can hand you the right age, and the biggest one on the question doesn't try. Barzilay and colleagues followed 10,588 American children in the ABCD cohort and checked their health at age 12. Children who owned a smartphone at 12 had higher rates of depression, obesity and insufficient sleep than children who didn't — and for obesity and sleep, each earlier year of getting that first phone came with higher odds again. It's an observational study, so it shows links, not proof. But it's the clearest timing evidence parents have, and it points one way: the risks cluster early.
The short answer: nobody can give you the age
If you came here for a number, here is the honest version first. No study — including this one — has ever tested first phones at different ages and crowned a safe one. There is no trial, and there can't really be one: nobody is going to randomly assign nine-year-olds a smartphone and wait to see what happens.
What research can do is watch what actually happens to thousands of real children, and see where the problems cluster. That is what this study did. Its answer is about timing and risk, not a birthday.
What did the researchers actually do?
Barzilay and colleagues used the Adolescent Brain Cognitive Development Study — the ABCD Study, a long-running US project following children through adolescence. Their sample was 10,588 children. Parents reported whether their child owned a smartphone and the age they first got it, and the researchers measured three health outcomes at age 12: depression, obesity, and insufficient sleep.
They also adjusted for the obvious alternative explanations — family income and education, puberty, whether the child had other devices, how much parents monitored them — and the links survived those adjustments. Then they ran a second check a year later: among 3,486 children who had no phone at 12, they compared the ones who got a phone during that year with the ones who still didn't have one at 13, this time controlling for how those children were already doing at 12.
What age do kids get their first phone?
In this cohort, earlier than most parents probably expect. The median age of a first smartphone was 11. By age 12, 6,739 of the 10,588 children — roughly two in three — already owned one.
Worth pausing on: when kids say everyone already has one, in this group they were mostly right. But notice what these numbers are. They describe what is happening. Whether it should be is a different question, and it's the next section.
When should a kid get their first phone? What the study found about earlier vs later
At age 12, children who owned a smartphone had higher odds of all three outcomes than children who didn't: depression (odds about 31% higher), obesity (about 40% higher), and insufficient sleep (about 62% higher — the largest gap of the three).
Then there was a gradient. Among children who had a phone, when they got it mattered for two of the outcomes: each earlier year of getting a phone came with about 9% higher odds of obesity and about 8% higher odds of insufficient sleep. A child who got a phone at 9 had higher odds on both than a child who got the same phone at 11.
The age-13 check pointed the same way. Children who got their first phone between 12 and 13 had, at 13, about 57% higher odds of scoring in the clinical range on a standard mental-health questionnaire, and about 50% higher odds of insufficient sleep, than children who remained phoneless — even after the researchers accounted for how both groups were doing a year earlier.
Read those numbers carefully, though. They are associations from one large, well-run cohort — not proof the phone caused any of it.
What this study can't tell you
It can't prove cause. This is an observational study. Children weren't assigned phones; families chose. Families who hand over a phone at 9 differ from families who wait until 13 — in stress, work patterns, money, neighbourhood, a hundred things — and statistics can adjust for some of that, not all of it. It's possible the phone is part of the story. It's also possible the phone is a marker for a harder situation that was already there.
It doesn't cover the ages parents ask about most. The comparisons here are about phones arriving by 12 or 13. The study says nothing direct about a first phone at 15 or 16, because that wasn't the group being compared. "Later looked better within the range studied" is the claim. "14 is the safe age" is not in this paper — or any paper.
It studied smartphones, not phones in general. A basic call-and-text phone is a different thing from a smartphone: no app store, no feed, no group chats at midnight. This study didn't test one, so it can't certify it as safer. It just never measured it.
One country, one cohort. American children, health checked at 12 and 13. That's a lot of children — but it isn't every childhood.
Before you say yes: a first-phone readiness check
The study can't make this decision for you. But its pattern — risk clustering around sleep especially — suggests the questions worth asking before any phone changes hands. None of these are study findings. They're simply what the decision looks like when you slow it down:
- What's the phone actually for? If the honest answer is "so she can text me after football practice," that job doesn't need a smartphone. If it's "the whole class coordinates on it," that's a social question, and it's worth saying out loud as one.
- Can your child keep a phone out of the bedroom overnight? Sleep was the strongest and most consistent signal in this study — the biggest gap at 12, a per-year gradient, and the same result again at 13. A child who can't yet let a device sleep in the kitchen is telling you something the data happens to back up.
- How do limits go on the devices they already have? The first phone isn't a fresh start; it's an escalation of an existing pattern. If a tablet curfew is a nightly war, a phone in the pocket will be a bigger one.
- Remember that "not yet" is a complete sentence. Waiting isn't a ban, and it isn't a promise of never. Within the ages this study covered, each later year came with lower odds on the two outcomes that showed a gradient. Delay is the one lever here with any evidence behind it at all.
- If the answer is yes, set the shape on day one. Where it charges at night, who knows the passcode, what happens when a rule breaks — agreed while the phone is still in its box, not negotiated after. That's not from this study either. It's just much easier before than after.
Frequently Asked Questions
At what age should a child get their own phone?
There is no evidence-set age, and this study doesn't pretend otherwise. What it shows is where the risk sat in one very large group of children: owning a smartphone by 12 came with higher rates of depression, obesity and insufficient sleep, and for two of those outcomes, the earlier the phone arrived, the higher the odds. If you're waiting for the study to circle a birthday, it won't. It can tell you the direction the evidence leans — later, within the range studied — and after that, the readiness questions above are yours to answer for your child.
What age should a child get their first cell phone?
It depends on a word, because cell phone and smartphone aren't the same purchase anymore. This study measured smartphone ownership only — the internet-connected, app-carrying kind. A basic phone that calls and texts wasn't tested, so the study can't stamp it safe or flag it risky. If your child needs to reach you and nothing more, a basic phone is a genuinely different decision from the one this research is about — just know that's a judgement call, not a study result.
Does waiting actually change anything, or is this just correlation?
We can't be certain — the study is correlational. But two details make it harder to shrug off than a simple snapshot. The researchers adjusted for income, education, puberty, other devices and parental monitoring, and the links stayed. And in the age-13 follow-up, children who looked similar on paper at 12 — no phone, similar mental health and sleep — had diverged a year later, with more clinical-range mental-health scores and more insufficient sleep in the group that had acquired a phone. That still isn't proof. It is the pattern you'd expect to see if timing matters, and it's why the authors say the findings should inform how caregivers think about the decision.
📄 The paper at a glance
Barzilay, R., Pimentel, S. D., Tran, K. T., Visoki, E., Pagliaccio, D., & Auerbach, R. P. (2026). "Smartphone Ownership, Age of Smartphone Acquisition, and Health Outcomes in Early Adolescence." Pediatrics, 157(1), e2025072941. DOI: 10.1542/peds.2025-072941
- Design: observational cohort analysis (ABCD Study) — not a trial; associations only
- Who: 10,588 US children; ownership and first-phone age reported by caregivers; health measured at ages 12 and 13
- Headline result: owning a smartphone at 12 was linked to higher odds of depression (OR 1.31), obesity (OR 1.40) and insufficient sleep (OR 1.62)
- The timing gradient: each earlier year of first phone → higher odds of obesity (OR 1.09 per year) and insufficient sleep (OR 1.08 per year)
- What it doesn't show: a recommended age, proof that phones caused the outcomes, or anything about basic call-and-text phones — none of those were tested
The takeaway
Parents keep asking for the right age because it feels like there should be one. This study of 10,588 children suggests the question underneath every first phone decision is the real one: not what age, but how early is too early for this child — and on the evidence here, the risks it could measure clustered at the early end, with sleep taking the clearest hit. Nobody can circle a birthday for you. But "not yet" is not doing nothing. On this evidence, it's the one move that leans the right way.
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Disclaimer: This article explains scientific research and is not medical or parenting advice for a specific child.