- A broadband dongle is a USB device that connects a single computer to the internet over the mobile network.
- It contains a SIM and provides a connection for the device it is plugged into, unlike a MiFi which creates WiFi.
- Dongles are useful for connecting one laptop on the move where WiFi is unavailable.
- Data comes from a mobile plan, so allowances and coverage are key considerations.
- Locked dongles work only with a specific network, while unlocked ones accept other SIMs.
A broadband dongle is a USB device that connects one computer to the internet over the mobile network via a SIM. It suits a single device on the move, with data allowances, coverage and locking the main considerations.
Last reviewed: June 2026
What a broadband dongle is
A broadband dongle is a small USB device that provides an internet connection over the mobile network to the computer it is plugged into. It contains a SIM, like a phone or MiFi, and connects that single device to the internet using mobile data. Unlike a MiFi, which creates a WiFi network for multiple devices, a dongle typically provides a connection for just the one device it is attached to. This makes it a simple, focused solution for getting a single laptop online over the mobile network, particularly where WiFi is unavailable.
Dongles were among the earliest forms of mobile broadband and remain a straightforward option for individual connectivity. Understanding how they work, and how they compare with a MiFi and tethering, helps decide when a dongle is the right tool.
How a dongle works
A broadband dongle plugs into a USB port on a computer and connects to the mobile network through its SIM, providing internet access to that computer. Setting one up usually involves inserting a SIM, plugging the dongle in, and installing any required software or drivers, after which the computer connects through it. Because the dongle serves the device it is plugged into, it does not create a shared WiFi network, which keeps it simple but limits it to one device at a time. For a single user with a laptop, this directness can be an advantage, providing a connection without the extra step of joining a WiFi network.
| Feature | Dongle | MiFi | Tethering |
|---|---|---|---|
| Devices connected | One, over USB | Several, over WiFi | Several, over phone WiFi |
| Extra device needed | Yes, the dongle | Yes, the MiFi | No, uses the phone |
| Effect on phone | None | None | Drains and ties up phone |
| Best for | Single laptop on the move | Several devices | Occasional sharing |
When a dongle is useful
A broadband dongle is most useful for connecting a single computer to the internet over the mobile network where WiFi is not available. This suits a laptop user on the move, working in places without reliable WiFi, or needing a connection independent of any local network for privacy or convenience. It can also serve as a backup for a single device. Because it focuses on one device, it is well suited to individual use rather than connecting a household. For someone who only needs to get one laptop online over mobile data, a dongle is a simple and effective option.
Data limits and plans
As with all mobile broadband, a dongle uses data from a mobile plan, so the data allowance is a key consideration. Dongle plans range from small allowances to larger ones, and some offer pay-as-you-go options. Light use, such as browsing and email, uses little data, while heavier use, such as streaming or large downloads, consumes data quickly. Matching the data plan to the intended use is essential to avoid running out. As with a MiFi, the data plan often determines how useful the dongle is in practice, so checking the allowance and how it suits the planned use is important before relying on it.
Locked versus unlocked dongles
Dongles can be locked or unlocked, which affects which SIMs they accept. A locked dongle works only with a SIM from the specific network it is tied to, which is common when a dongle is supplied with a particular provider's plan. An unlocked dongle accepts SIMs from different networks, giving flexibility to choose or change the data plan and network. For someone who wants to use a specific network or shop around for data plans, an unlocked dongle offers more freedom, while a locked dongle supplied with a plan can be simpler if that network's coverage and plan suit the need.
Dongle versus MiFi versus tethering
Comparing the options clarifies when a dongle fits. A dongle connects one device directly over USB, which is simple but limited to that device. A MiFi creates a WiFi network for multiple devices, offering more flexibility for several devices or for connecting without a USB port. Tethering uses a phone to share its connection, which is convenient but drains the phone. For a single laptop, a dongle is a focused solution; for multiple devices, a MiFi is better; and tethering suits occasional sharing without extra equipment. The right choice depends on how many devices need connecting and whether a dedicated device is wanted.
Limitations of dongles
Dongles have limitations to consider. They depend on mobile coverage, so performance varies with the signal at the location. They connect only one device, which limits them compared with a MiFi or home router. Data allowances can make heavy use expensive or impractical. And as mobile connectivity, they are generally better suited to lighter or occasional use than to heavy permanent home connectivity. For a single user needing occasional mobile internet on a laptop, these limits are rarely a problem, but for broader needs, a MiFi or fixed connection is usually more suitable.
Choosing a dongle
Choosing a dongle involves matching it to the intended use. Considering the mobile coverage where it will be used, the data allowance needed, and whether a locked or unlocked device suits guides the choice. For occasional single-device use on the move, a simple dongle with an adequate data plan is ideal. Where flexibility over networks is wanted, an unlocked dongle helps. As with all mobile connectivity, checking coverage and choosing an appropriate data plan are the most important steps, since these determine whether the dongle will meet the need reliably.
Is a dongle right for you
In summary, a broadband dongle is a USB device that connects a single computer to the internet over the mobile network using a SIM, providing a simple, focused connection for one device where WiFi is unavailable. It suits individual use on the move and as a backup, with data allowances, coverage and whether it is locked or unlocked the main considerations. For connecting multiple devices a MiFi is better, and for heavy home use a fixed connection is preferable, but for a single laptop a dongle remains a practical option.
Frequently Asked Questions
What is a broadband dongle?
A broadband dongle is a small USB device that provides an internet connection over the mobile network to the computer it is plugged into, using a SIM. Unlike a MiFi, which creates a WiFi network for multiple devices, a dongle typically connects just the one device it is attached to, making it a simple solution for getting a single laptop online over mobile data.
How fast is a broadband dongle?
Speed depends on the mobile network and the signal quality at the location, as a dongle uses mobile data. In areas with a good 4G or 5G signal it can provide a usable connection for browsing, email and lighter use, while a weaker signal gives lower speeds. It is best suited to lighter or occasional use rather than heavy permanent connectivity.
Can I use any SIM in a broadband dongle?
It depends on whether the dongle is locked or unlocked. A locked dongle works only with a SIM from the specific network it is tied to, while an unlocked dongle accepts SIMs from different networks. An unlocked dongle offers flexibility to choose or change the data plan and network, while a locked one supplied with a plan can be simpler.
Is a broadband dongle better than a MiFi?
It depends on the need. A dongle connects one device directly over USB, which is simple but limited to that device, while a MiFi creates a WiFi network for multiple devices, offering more flexibility. For a single laptop a dongle is a focused solution, while for connecting several devices a MiFi is better suited.
Do broadband dongles work with all laptops?
A dongle plugs into a USB port and usually requires any necessary software or drivers to be installed, after which the laptop connects through it. Most laptops with a compatible USB port can use a dongle, though it is worth checking compatibility, particularly for the operating system and the USB port type, before relying on one.
What are the main limitations of a dongle?
A dongle depends on mobile coverage, connects only one device, and is subject to data allowances that can make heavy use expensive. As mobile connectivity, it is better suited to lighter or occasional use than heavy permanent home use. For multiple devices a MiFi is better, and for heavy home use a fixed connection is preferable.
