How do I use my phone as a hotspot for a laptop?
Tethering done properly: the three ways to connect, the settings that stop a laptop eating your allowance, and how to get more than a few minutes of use without flattening the phone.
- Difficulty
- beginner
- Time
- 20 min
- Read
- 5 min
- Safety
- caution
Short answer
Turn on the personal hotspot in the phone's settings, set a password, and join it from the laptop like any other wifi network. Then immediately mark the connection as metered on the laptop, which stops Windows downloading updates and cloud folders syncing over it. Plugging the phone into the laptop by cable instead is faster, more stable and charges the phone while you work.
Tethering has quietly become one of the most useful things a phone does, and it is treated as an emergency measure rather than a tool. A modern mobile connection is often faster than the wifi in a hotel, a train, a holiday let or an office visitor network, and it is a network you control rather than one you have to trust. The two things that make it unpleasant are avoidable: a laptop that treats it as unlimited home broadband and consumes an allowance in an afternoon, and a phone that runs flat in an hour. Both have straightforward settings-level answers that almost nobody applies.
Safety
Step by step
- Check your plan allows it and what it costs.Almost all UK plans include tethering now, but some cheaper and some unlimited plans cap the tethered allowance separately from the phone's own, and roaming rules can differ again. Check before relying on it on a trip rather than after.
- Turn on the hotspot and set a proper password.iPhone: Settings, Personal Hotspot. Android: Settings, Network and internet, Hotspot and tethering. Change the default password — hotspot names are broadcast and a default or weak password on a hotspot in a public place is worth someone's time.
- Mark the connection as metered on the laptop, immediately.On Windows, Settings, Network and internet, the connection's properties, Metered connection. On a Mac, the Low Data Mode setting for that network. This single step stops Windows Update downloading gigabytes and pauses most cloud sync, and it is the difference between tethering being useful and being expensive.
- Pause the big consumers by hand as well.OneDrive, iCloud Drive, Dropbox, Google Drive, photo backup and any backup software. All of them have a pause option. A single photo library finishing its upload can consume more data than a week of ordinary work.
- Use a cable rather than wifi when you can.USB tethering is faster, has no radio interference, works when wifi is congested, and charges the phone while you use it — which removes the battery problem entirely. On iPhone with Windows this needs Apple's drivers installed; on Android it is a single toggle.
- Use Bluetooth tethering for long, light sessions.Much slower, and it uses a fraction of the battery. For email, messaging and text-based work on a long journey it is a genuinely sensible choice, and the phone will still be alive at the end.
- Deal with the battery deliberately.Hotspot over wifi is one of the heaviest things a phone does, running two radios at full power. Expect a few hours at most. Plug the phone in, use cable tethering, or carry a power bank — the catalogue has a guide on choosing one.
- Understand the automatic connection features.Apple devices on the same account can join an iPhone's hotspot without it being turned on manually, and Android has a similar arrangement within a Google account. Convenient, and also how a laptop connects and starts syncing without you noticing — which is the case the metered setting protects you from.
Common mistakes
- Connecting a laptop without marking the network metered — Windows will happily download a feature update over a mobile connection. It is the single most common way people discover tethering has cost them money.
- Leaving the hotspot on all day — It runs the battery down even with nothing connected, and it broadcasts a network anyone can attempt to join. Turn it on when needed.
- Using a weak or default hotspot password — In a station or an office the network name is visible to everyone nearby, and anyone who joins is spending your allowance and appearing to the internet as you.
If it doesn't work
Laptop connects but there is no internet
Cause: Mobile data off, or the hotspot has no signal — Fix: Check mobile data is on and that the phone itself can load a page. A phone on wifi and a hotspot is a common confusion — the hotspot shares the mobile connection, and on some phones it will not start at all while the phone is on wifi.
Hotspot turns itself off after a few minutes
Cause: A power-saving timeout when no device is connected — Fix: Both platforms switch it off if nothing joins. Start the hotspot and join promptly, or find the setting that keeps it on.
Very slow despite good signal
Cause: Congestion, a fair-use throttle, or the wifi band — Fix: Some plans throttle tethering after a threshold. Also try switching the hotspot's band — 5 GHz is much faster over short distances and 2.4 GHz reaches further.
Data allowance disappeared in an afternoon
Cause: The laptop treated it as home broadband — Fix: Set the connection metered and pause cloud sync. Windows Update and a cloud photo library are the two usual culprits and both are easily tens of gigabytes.
Phone gets very hot
Cause: Two radios at full power, often in a case and in the sun — Fix: Take the case off, keep it out of direct sun, and switch to cable tethering. The catalogue has a guide on phones overheating.
Works at home, not abroad
Cause: Roaming rules on the plan — Fix: Some plans allow roaming data but not tethering, or cap it much lower. Check the plan's roaming terms before travelling, and the catalogue's guide on using a phone abroad covers the wider question.
Questions people ask
Is tethering slower than home broadband?
Increasingly, no — a good 5G connection often beats a modest fixed line for download speed, though latency is usually higher, which matters for video calls and gaming. In a poor-signal area it will be much worse. It is worth testing rather than assuming either way.
Does tethering use more data than using the phone directly?
Yes, meaningfully. A laptop requests full desktop websites, full-resolution images and full-size updates, where a phone gets mobile-optimised versions. Expect the same browsing to consume several times more data through a tethered laptop.
Can I tether more than one device?
Yes, usually up to about five, though performance and battery both suffer quickly. A travel router is the better answer if you regularly need several devices online through one mobile connection.
Will my provider know I am tethering?
They can tell, and it is not something to be concerned about on a plan that permits it, which nearly all now do. Where it matters is on plans that cap tethering separately — there, the allowance is tracked and enforced.