
SIM Card Replacement
Detect if your child is using a secret SIM card.
Get notified if a new SIM card is activated on your kid's phone.
Monitor every activity, even if a SIM card has been replaced.
Find out what your child is hiding with another SIM card.
All features
9 categories of powerful monitoring tools for complete parental control
59 features
All features
9 categories of powerful monitoring tools for complete parental control
General9
Communication & Logs
Location & Tracking
Device Monitoring
Remote Control & Security
Messaging Apps10
Dating2
Media1
Internet1
Streaming2
Deleted info3
Control7
Access & Content Control
Communication
What Is the SIM Card Replacement Feature?
Reasons why your child might be using two SIM cards may differ. But no matter what the reason is, you should be aware when it happens. uMobix will let you know when your kid decides to replace the SIM card. Using a SIM card tracking feature will help you to notice this change right on time. The SIM card replacement detecting feature is a tool that tracks when a new SIM card is installed on a target device. As soon as your child uses a new SIM card, you will get an instant notification on your dashboard.
If your kid doesn't own a dual SIM smartphone, there is most likely no obvious reason for using another SIM card—as long as there is nothing to hide from your parents. A SIM card replacement is a useful tool that will monitor not only key activities, such as messaging, calling, or using any social media apps, but will also detect if your child replaced a SIM card.

Ready to begin?
uMobix gives you access to 40+ features — SMS, social media, GPS location, app activity, and more — all visible from one secure dashboard.
How Does SIM Card Replacement Work?
uMobix notifies you when the SIM card in the tracked device is replaced in real time, but it is completely unnoticeable on the target device, and there is no way it can compromise your privacy; anonymity is guaranteed. If your child changes their phone number - you will know immediately. Here is how to proceed:
- 1
Create a uMobix account using your email address and choose a subscription plan.
- 2
Install uMobix on your child's Android device by following the setup instructions sent to your email.
- 3
Log in to your uMobix dashboard using the credentials sent to your email and open the feature you need.
- 4
Start monitoring activity and managing the available controls from your secure dashboard.

Why parents choose uMobix
Track activity, location, and screen time live with one powerful phone tracker and easy parental monitoring app by uMobix
View all incoming and outgoing calls with timestamps, duration, and contact details to understand who your child communicates with.
Access photos and videos stored on the device and save important files when needed.
Track real-time GPS location and review route history to know where your child is and where they've been.
Check browser history and AI requests to understand what your child searches, reads, or asks online.
Trusted by users worldwide
Frequently Asked Questions
Can you track the location of the location of a SIM card?
How can I track my lost SIM card?
How can I track my SIM card online?
How to easily tell if someone has switched a SIM card?
Will I know if my child changes the SIM card?
Will I still be able to track all the activity, even with the new SIM card?






