In an ideal world, you’ll connect all of your devices up to fast, free-flowing wifi wherever you happen to be, but away from home you’ll often run into restrictions: Maybe only a certain number of devices can be connected per user, or maybe wired Ethernet access is free but wifi comes at a premium.
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If you’re in a hotel or a coffee shop or wherever, you might also find that your phone connects to the provided wifi but your laptop doesn’t, or vice versa. Networks that aren’t your own can be tricky to access, and you won’t always have time to launch into a full-blown troubleshooting session.
If one of your devices can connect to the internet but your others can’t for whatever reason, these are the options open to you. Windows has the best solutions for this, but you can make do with different kinds of tethering on macOS and Android. Unfortunately, you can’t share a non-cellular internet connection from iPhones and iPads, even if you’re tethering via Bluetooth or over USB.
This is really a hardware limitation: most devices, especially phones, aren’t geared up to both receive wifi and transmit wifi at the same time (that’s why when you typically create a mobile hotspot on an iPhone or Android device, the wifi automatically turns off and you’re put back on your cellular connection).
If you do a lot of traveling, you might consider investing in a travel router that hooks up to a cell network and then provides wifi for as many devices as need it. Alternatively, find yourself a phone or a tablet with a good data plan that can be used for tethering, so you don’t need to rely on the wifi networks you come across on your wanderings (this is better from a security perspective, too).
Windows
Open up the Settings pane (click the cog on the Start menu), then go to Network & Internet and choose Mobile hotspot. You can use this feature to share a cellular connection or an internet connection, but it’s the latter we’re interested in here, so make sure WiFi or Ethernet is selected under Share my Internet connection from.
You also need to pick WiFi as the Share my Internet connection over option (unless you’d rather use Bluetooth for some reason), and then you can turn on the Share my Internet connection with other devices toggle switch.
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