No. Your child does not need their own smartphone, and there is no required LAGENIO subscription or long-term contract to use the K3.

The K3 is compatible with supported 4G Nano SIM cards with voice calling and mobile data. Parents use the LAGENIO App on their own iOS or Android phone to manage contacts, check location, set Class Mode and access parental controls.

The K3 works with a compatible physical 4G Nano SIM that supports both voice calling and mobile data. eSIM is not supported, and data-only SIM cards are not recommended.

For the most reliable experience, we recommend using a SIM issued directly by the mobile network operator itself, rather than an MVNO using the same network. Some MVNO SIMs may also work, but compatibility can vary.

For U.S. versions, a SpeedTalk SIM comes pre-inserted. Activation is optional, and you can use another compatible Nano SIM instead.

Check LAGENIO SIM Compatibility →

Parents control who can communicate with their child through the LAGENIO App. The K3 supports up to 15 contacts, including up to 3 emergency contacts.

Approved family members and trusted contacts can be managed by the parent, helping children stay connected with the people they know while limiting unwanted contact from unknown callers.

Each K3 includes one watch and two interchangeable straps in your selected color set, giving your child two different color options with the same watch.

Choose from:

• Blue + Black — 2 straps included
• Pink + Purple — 2 straps included

This gives your child two different looks with one K3, making it easy to switch colors whenever they want a different style.

No. The K3 does not support third-party messaging or social media apps such as WhatsApp, and it does not provide an open app store or unrestricted web browsing.

The K3 is designed around safe communication, location tracking and simple everyday features, giving children a more focused smartwatch experience without the endless apps, social feeds and online distractions of a regular smartphone.

The K3 uses 5-way positioning — GPS, Wi-Fi, LBS, A-GPS and accelerometer positioning — to help parents check their child’s location in different environments.

GPS generally provides the best accuracy outdoors with a clear view of the sky. Indoors or where GPS signals are weaker, the K3 can use other available positioning methods to help determine its location.

Location accuracy can vary depending on the environment, network signal and positioning method. The watch must also be powered on and connected to a network for location updates to be available.

Class Mode helps reduce distractions during scheduled class hours. When it is active, calls, messages and other distracting functions are restricted so your child can focus on class.

Location tracking remains active, so parents can still check the watch’s location during Class Mode. Normal functions return when the scheduled Class Mode period ends.

The K3 supports 4G voice calls, video calls, NIO Call over Wi-Fi or 4G mobile data, and voice messages between the watch and the LAGENIO App.

The K3 has a 770mAh battery, depending on how the watch is used.

Actual battery life can vary. Factors such as GPS update frequency, video calls, screen time, mobile signal strength and other connected features can affect how long a charge lasts.

The K3 is IP68-rated for everyday water resistance and is designed to handle situations such as rain, hand washing and accidental splashes.

However, IP68 does not mean the watch should be worn in every water-related situation. We recommend removing it before showering, bathing, swimming or entering the sea, and avoiding hot water, steam and strong or continuous water pressure.

Soap, shampoo, salt water, heat and repeated water exposure can affect water resistance over time.

In simple terms: the K3 is designed for everyday splashes, but take it off before bathing, swimming or going into the sea.

LAGENIO takes privacy and data security seriously. Access to manage the K3 through the LAGENIO App is parent-controlled, and additional family members must request access and be approved by the administrator.

Our Privacy Policy explains how personal information is collected, used, disclosed and protected, as well as the privacy rights that may apply to you.

LAGENIO offers a 30-day return period for eligible purchases. If the K3 isn’t right for your family, you can request a return or exchange within 30 days of receiving your order, provided it meets the conditions of our Return Policy.

Please contact LAGENIO Support before sending the watch back so we can guide you through the return process.

View Return Policy →

Does the LAGENIO K3 come with a warranty?

Yes. The LAGENIO K3 comes with a 1-year limited warranty covering eligible manufacturing and product quality issues under normal use.

Warranty coverage is subject to the terms and exclusions in our Warranty Policy. If you experience a problem with your K3, our support team can help review the issue and guide you through the next steps.

View Warranty Policy →