Hotspot
Wi-Fi Hotspot
A Wi-Fi access point that shares an internet connection with the devices around it — whether that is your phone broadcasting its mobile data, a pocket device, or the network at your local cafe.
A hotspot is any point that provides internet access to nearby devices over Wi-Fi. The word covers a range of things that share one idea: a single connection is broadcast as a Wi-Fi network that other devices can join. Your laptop does not know or care whether the hotspot is a phone, a dedicated gadget, or a coffee shop's router — it just sees a network to connect to.
The main kinds of hotspot
| Type | What it is |
|---|---|
| Mobile hotspot | Your phone shares its cellular data as a Wi-Fi network |
| Dedicated hotspot (MiFi) | A small battery-powered device with its own SIM, purpose-built to share mobile data |
| Public hotspot | Wi-Fi at a cafe, hotel, airport, or library, often behind a captive portal |
Hotspot vs tethering
The two terms are often used interchangeably, but there is a clean distinction. Tethering is the general act of sharing one device's internet with another, by any method. A mobile hotspot is specifically the Wi-Fi form of tethering — your phone creates a Wi-Fi network. You can also tether over a USB cable or Bluetooth, which are not hotspots but achieve the same sharing. In short: every Wi-Fi hotspot from a phone is tethering, but not every form of tethering is a hotspot.
What limits hotspot performance
A mobile hotspot is only as good as the cellular signal feeding it, so the same coverage that gives your phone fast data gives the hotspot fast data. Beyond signal, three things commonly hold hotspots back:
- Plan limits: many carriers meter hotspot data separately and throttle it sharply after a monthly allowance, even on "unlimited" plans.
- Battery and heat: broadcasting Wi-Fi while using cellular drains the host device quickly and can cause thermal throttling.
- Shared capacity: every device on the hotspot shares one cellular connection, so a few heavy users slow everyone.
A note on public hotspot safety
Public hotspots are convenient but open: you are sharing a network with strangers, and the operator can see more about your traffic than your home network would. Use HTTPS sites (which is now the default for most of the web), avoid entering sensitive credentials on networks you do not trust, and consider a VPN to encrypt everything you send. The risk is lower than it once was thanks to widespread encryption, but a hostile or poorly secured public hotspot is still worth treating with caution.