Complete Guide to Mobile Plans for Kids | Protect Your Child's Safety with Budget SIMs

When giving children smartphones, many parents want to prepare a safe and affordable plan suitable for their kids. With low-cost SIMs, you can significantly reduce monthly phone bills while also utilizing filtering features to protect your child’s safety. However, with so many services available, many people wonder, “Which plan is best for children?” and “What are the differences between iPhone and Android options.”

At MyBest, we have contracted with over 10 popular low-cost SIM and plan providers to thoroughly evaluate six key points: filtering functions, parental controls, cost, communication speed, signal stability, and coverage. We have carefully selected affordable plans that parents can confidently give to their children. We also include advice from smartphone safety experts.

Three Key Points When Choosing a Low-Cost Phone for Kids

1. Quality of Filtering Features
To prevent children from falling into internet troubles, tiered filtering based on age is essential. Since support varies between iPhone and Android, choosing a plan compatible with your device is crucial.

2. Location Tracking and Usage Time Limits
Knowing where your child is and whether they are overusing their phone provides peace of mind. Robust monitoring features that allow parents to oversee their child’s location and usage are highly beneficial.

3. Monthly Cost Balance
The strength of low-cost SIMs is their affordability. Selecting a plan that matches your data needs helps create a budget-friendly mobile environment.

How to Choose a Child-Friendly iPhone Plan

For iPhone users, providers like LINEMO and J:COM MOBILE offering “安心フィルター” (Safe Filter) are strong options. Many plans allow tiered settings based on age, enabling gradual progression as your child grows. Since app-level filtering can be limited on iPhone, verifying available features beforehand is essential.

LINEMO (SoftBank) offers four levels of settings—“Elementary School,” “Middle School,” “High School,” etc.—with comprehensive location tracking. It balances protection features, cost, and speed well. J:COM MOBILE also provides free filtering functions and solid support.

Comparing Low-Cost Android Plans

For Android, options like LinksMate, Japan Communications SIM, and IIJmio are recommended. These services support “i-フィルター” (i-Filter), offering features like app-specific time limits and location tracking, making parental monitoring easier. They tend to be affordable, with many plans allowing detailed data capacity choices.

LinksMate is especially budget-friendly at 902 yen/month for 3GB, with free access to “i-Filter.” IIJmio offers flexible plans starting from 2GB, ensuring sufficient speed for activities like watching videos during commutes.

Rankings of Child Phone Plans by Price and Features

1st Place: LINEMO (4.55 points)
Top choice for iPhone. Affordable at 990 yen/month for 3GB, with free, comprehensive “安心フィルター” features. Includes search word monitoring to detect SOS signals from children.

2nd Place: povo (4.42 points)
Offers customizable data via topping plans. Flexible options tailored to your child’s usage, with a groundbreaking zero-yen basic fee.

3rd Place: Tone Mobile (4.34 points)
Specializes in child monitoring features. App-specific time limits and AI-powered camera functions to block inappropriate images provide strong protection.

4th Place: LinksMate (4.11 points)
Best budget plan for Android users at 902 yen/month for 3GB, with free “i-Filter” and reliable speeds at all times.

5th Place: Japan Communications SIM (4.02 points)
Lowest prices for 10GB among low-cost SIMs. However, limited protection features for iPhone make it more suitable for Android.

6th Place: J:COM MOBILE (4.01 points)
Stable au network with basic protection features. Support at physical stores offers added reassurance.

7th Place: y.u mobile (3.96 points)
Unique benefit: free repair insurance up to 30,000 yen annually. Good for parents worried about children dropping their phones.

8th Place: IIJmio (3.96 points)
Reliable choice for Android. Affordable at 1,346 yen/month for 5GB, with multiple line options.

9th Place: UQ Mobile (3.95 points)
Extensive nationwide store support. Top-tier communication quality but higher cost at 2,948 yen/month for 5GB.

10th Place: AEON Mobile (3.9 points)
Offers detailed plans in 0.5GB or 1GB increments. Android models include child monitoring features.

Common Questions When Choosing a Child Phone Plan

Are kids’ phones or low-cost SIMs better?
For children who communicate via email or LINE with friends, smartphones with low-cost SIMs are practical. Parental monitoring features in affordable plans also ensure safety.

Are there additional costs besides monthly fees?
Most low-cost SIMs offer free or low-cost filtering. However, if your child makes many calls, additional call options may be needed.

How to prevent children from overusing their phones?
Many plans include usage time limits that automatically restrict app access after set hours. Managing data capacity monthly is also effective.

When giving your child a phone, prioritize plans with reliable safety features and a balanced, affordable price that both parents and children can feel comfortable with.