A mobile hotspot is a way to share your phone's cellular data, such as a 4G LTE or 5G connection, with another device. Internet activity on the connected device uses your mobile plan's data allowance, including any separate hotspot or tethering limit.
Apple states that Personal Hotspot uses the iPhone's cellular data connection. Google describes Android tethering as sharing mobile data with another device.
How Mobile Hotspot Data Works
When you turn on a hotspot, your phone creates a Wi-Fi network. The connected laptop, tablet, streaming device or phone uses that network, while your phone normally reaches the internet through its cellular connection.
| Activity on the connected device | Uses mobile hotspot data? |
|---|---|
| Browsing websites | Yes |
| Watching YouTube or Netflix | Yes |
| Downloading files or apps | Yes |
| Making video calls | Yes |
| Installing software updates | Yes |
| Sending messages through internet apps | Yes |
| Connecting to the hotspot without using the internet | Usually no meaningful data |
Turning on the hotspot does not normally use much data by itself. Data is used when the connected device sends or receives information. Background activity, including cloud backups, app updates and email syncing, can use data even when you are not actively using the device.
Does Hotspot Data Count Against Your Regular Data Plan?
Usually, yes, but carriers handle hotspot data in different ways. Some plans count it against the main data allowance. Others include a separate hotspot allowance, reduce speeds after a limit or charge extra for tethering. Google advises checking carrier restrictions because some carriers limit or charge for tethering.
Check your plan for terms such as:
- Mobile hotspot data
- Tethering data
- Personal Hotspot
- High-speed hotspot data
- Mobile broadband data
An unlimited data plan does not always include unlimited high-speed hotspot data.
Does Using a Hotspot Use More Data Than Using the Phone Normally?
The same online activity generally uses a similar amount of data, but computers often use more data than phones.
A laptop connected to a hotspot may use extra data for:
- Operating system updates
- Cloud storage synchronisation
- High-resolution video
- Automatic photo backups
- Website images and advertisements
- Large downloads
- Game updates
A phone may use less data because mobile apps often compress content and limit background activity. A computer may treat a hotspot connection like regular Wi-Fi unless you mark it as metered.
How to Reduce Hotspot Data Usage
- Set the connected device's network as metered. This can reduce automatic downloads and background activity.
- Pause cloud backups and file synchronisation.
- Turn off automatic app and operating system updates.
- Lower video quality on YouTube, Netflix and other streaming services.
- Avoid downloading games or large files over the hotspot.
- Disconnect devices when you finish using them.
- Check hotspot usage in your phone and carrier account settings.
Android also provides hotspot and network data controls, although menu names can vary by device manufacturer and Android version.
Does a Hotspot Use Data When No Device Is Connected?
Normally, a hotspot uses no meaningful amount of data when no device is connected. Some phones can turn the hotspot off automatically when no devices are connected.
If a device stays connected, background processes can continue using mobile data even when you are not actively browsing.
Does a Mobile Hotspot Use Wi-Fi or Cellular Data?
A standard phone hotspot uses cellular data for internet access and Wi-Fi to connect nearby devices. The connected device sees a Wi-Fi connection, but the internet data normally comes through the phone's 4G LTE or 5G network.
Some Android phones can share a Wi-Fi connection through tethering, but this depends on the device. Apple's Personal Hotspot uses the iPhone's cellular connection for internet access.
Bottom Line
Check your carrier's hotspot allowance before connecting a laptop or tablet. On an unlimited plan, high-speed hotspot data may still have its own limit, and background activity can use that allowance without much warning.