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The myFirst Fone S4 is a kids’ smartwatch phone built to give parents peace of mind without handing a full smartphone to a six‑to‑ten‑year‑old. It mixes real 4G calling, accurate GPS tracking and a surprisingly polished AMOLED screen with gamified “missions” and habit tracking so it feels more like a fun gadget than a digital leash.

What is the myFirst Fone S4?

The Fone S4 is a 4G LTE smartwatch designed specifically for children roughly aged 5–12, with an integrated eSIM, GPS, Wi‑Fi and a 5MP camera packed into a chunky, kid‑proof shell. It runs a locked‑down Android‑based OS that ties into the myFirst Circle app, where parents manage contacts, see location, set class modes, and control what the watch can actually do. MyFirst Fone S4 is available for SGD 299 from myFirst and all leading electronic retailers. ​

Specifications

FeatureDetails (myFirst Fone S4)
Display1.65″ AMOLED, 348×443 resolution, always‑on capable
ProcessorSpreadtrum W377E quad‑core
RAM / Storage1GB RAM, 8GB storage
Connectivity4G LTE (eSIM), Wi‑Fi b/g/n, Bluetooth 4.2
SensorsGPS (dual‑band L1+L5), heart‑rate, pedometer
Camera5MP HDR with stabilisation and filters
Battery605mAh, rated up to ~10 hours mixed use
DurabilityIPX8 water resistance, kid‑focused rugged design
Weight~48g; 52×43×14.5mm case

Design & Build.

The S4 looks like a shrunken adventure watch crossed with a toy—chunky bezels, bright colours like Space Blue and Cotton Candy, and a soft strap sized for small wrists. It’s light at about 48g but feels sturdy enough to survive playground abuse, with IPX8 water resistance meaning pool splashes and sudden rain showers are non‑issues.

The 1.65‑inch AMOLED panel is legitimately nice even by adult‑watch standards: sharp, colourful and bright enough outdoors, which makes it easier for kids to read the time and follow on‑screen prompts.

​​The single side button doubles as a quick camera trigger and an SOS key—hold it down and the watch fires off alerts and calls to guardians—so kids get an easy “panic button” they can remember. Overall it feels like a gadget children want to wear, which is half the battle with any kids’ tracker.

Features & Everyday Use

Where the S4 differentiates itself is in how seriously it takes both tracking and communication. It uses dual‑band GPS (L1+L5) combined with cellular and Wi‑Fi positioning for more accurate location updates in dense cities and high‑rise neighbourhoods, an area many cheaper trackers struggle with. In the myFirst Circle app, parents can see real‑time location, set safe zones, and review movement history, plus enable “Class Mode” to lock the watch down during school hours.

Communication is more flexible than a basic kids’ watch. The S4 supports clear 4G voice and video calls, group chats for up to eight family members or friends, and an “all‑in‑one” messaging system that handles texts, voice notes, photos, emojis and even polls. The quirky magiCode feature lets you send discrete vibration patterns as messages so kids can get simple cues (like “time to come home”) without lighting up the screen in class.​

Gamified activity tracking turns steps and tasks into “missions” and achievements, helping parents nudge kids towards more movement or routines like brushing teeth and packing bags. A heart‑rate monitor and step counter feed basic health stats back to the app, giving an at‑a‑glance view of how active your child has been.

Performance & Battery

Under the hood, the quad‑core chipset and 1GB of RAM are modest by phone standards but fine here. Menus and animations are generally smooth, and reviewers note that kids can find what they want without digging through endless nested menus. Simple games, the MP3 player and the camera all run acceptably, and the loudspeaker is strong enough for video calls and audiobooks in typical indoor environments.​​

Battery life is decent rather than incredible. The 605mAh cell can stretch through a school day of GPS, a few calls, and some photos, but heavy video calling or constant real‑time tracking will still mean nightly charging. The upside is that it charges over a simple pogo‑pin cradle, so you can drop it on the dock next to the bed like a mini phone. For holiday travel, the built‑in eSIM with bundled roaming plan in many markets removes one headache: you don’t need to hunt down a kids’ SIM at every destination.

Personal Impressions

Used as intended, the myFirst Fone S4 feels like a thoughtful middle ground between “dumb” kids tracker and full smartphone. Children get enough independence to call grandparents, share silly selfies with stickers, and compete on step missions; parents get accurate GPS, SOS alerts and tight control over who can contact their child. The always‑on AMOLED screen and polished UI make it feel more like a genuine gadget rather than a baby toy, which helps older kids accept it.

There are trade‑offs. Battery life is fine for a day but not much more, so charging becomes part of the evening routine. The closed ecosystem means friends need compatible myFirst devices or parent approval to chat, and serious screen‑time limits still require consistent rule‑setting at home. But as a purpose‑built “first phone on the wrist” that prioritises safety, controlled communication and habit‑building over TikTok and open browsers, the S4 hits its brief remarkably well. For parents who want to keep kids connected without throwing them into the full smartphone deep end, it’s an easy device to recommend.

TLDR;

The myFirst Fone S4 is a well-designed “first phone on the wrist” for primary-school kids, combining real calling, accurate GPS and gamified activity tracking with strong parental controls and a kid-friendly design.

The Good.

  • Bright 1.65‑inch AMOLED display that looks genuinely premium and is easy for kids to read.
  • Accurate dual‑band GPS with geofencing and location history for reliable peace of mind.
  • Full 4G voice/video calls, group chats and magiCode vibrations for flexible, kid-appropriate communication.
  • Strong parental controls via the myFirst Circle app (contacts whitelist, class mode, app limits).
  • Rugged, water‑resistant build that survives playground abuse and pool splashes.
  • Gamified missions and step tracking make healthy habits and movement fun rather than a chore.

The Bad.

  • Battery life is only day‑level with active GPS and calls, so nightly charging is effectively mandatory.
  • Closed ecosystem means kids can mostly only chat with pre-approved contacts or other myFirst users.
  • Limited storage and modest processor make it unsuitable for heavier apps or lots of media.
  • Bulky, toy-like styling may feel “too kiddy” for older tweens who are already eyeing full smartphones

About Post Author

Sky Oh, Contributor

Sky's The Technovore's International Man of Mystery. He travels the world, enjoying the high life but still finds the time to write!
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Sky's The Technovore's International Man of Mystery. He travels the world, enjoying the high life but still finds the time to write!