How do I activate or deactivate mobile data on my phone?

Smartphones connect us to the world through various means of communication and connectivity, so mobile data plays a crucial role in enabling us to access the Internet wherever we are. However, there are times when it's vital to activate or deactivate this functionality. For example, when traveling abroad, it's highly recommended to deactivate your data on arrival. That's why it's important to take a mobile plan covering an exhaustive number of countries, or a roaming pass, before you leave.
To disable data on your phone, here's a guide in a few simple steps.

On an Android phone

Open Settings: Unlock your phone and access your device settings.
Access network connections: Scroll down until you find the "Connections" or "Network and Internet" option and press it. This will take you to a list of options related to your device's connectivity.
Select mobile data: In the list of connection options, look for "Mobile networks" or "Mobile data" and press it. This will allow you to manage your cellular data settings.
Activate or deactivate mobile data: You'll see a switch or checkbox next to "Mobile data". Press it to toggle between on and off as required. When the switch is in the on position, your mobile data is activated, enabling you to access the Internet via your operator's network.
Test by visiting your browser. If the home page doesn't load, then your data is deactivated.

On an iPhone

Go to Settings with the "Settings" icon.
Scroll down the settings menu until you find the "Cellular data" option. Press it to access your cellular connection settings.
On the cellular data page, you'll see a toggle switch next to "Cellular data". Slide this switch to the right to enable cellular data, or to the left to disable it.
Test this by going to your browser. If the home page doesn't load, then your data is disabled.

By following these simple steps, you can easily enable or disable mobile data on your phone, giving you total control over your connectivity.