What happens when you connect to Wi-Fi
When you connect to a wireless network, your device sends out a request looking for networks in range, picks one, and exchanges a password with the router. If the password matches, you're in — your device can now send data through that router to the internet. The security of that connection depends entirely on three things: whether the network is encrypted, whether you're using a strong password, and whether you trust the person running the router.
Most home routers use WPA3 encryption (or WPA2 if your router is older). This scrambles the data traveling between your device and the router so that anyone nearby with a laptop cannot read your passwords, emails, or banking information just by listening to the radio signals. Without encryption, everything you send is readable to anyone in range.
The password you enter is not sent over the air — it's used to prove you're allowed to connect. A weak password (like "password123" or your street name) can be guessed in minutes by someone with basic tools. A strong password is random, at least 16 characters, and uses uppercase, lowercase, numbers, and symbols.
Key Takeaways
- Check that your router is set to WPA3 or WPA2 encryption before you connect any devices, because unencrypted networks expose all your data to anyone nearby.
- Change your router's default password (usually printed on the back) to something random with at least 16 characters, uppercase, lowercase, numbers, and symbols.
- On your device, forget networks you no longer use so your phone or laptop stops automatically reconnecting to them.
- Public Wi-Fi networks at coffee shops and airports have no encryption by default, so avoid logging into bank accounts or email on them without a VPN.
Finding and selecting the right network on your device
Open your device's Wi-Fi settings. On Windows, click the Wi-Fi icon in the bottom right corner of your screen. On Mac, click the Wi-Fi icon in the top right. On iPhone or Android, go to Settings and tap Wi-Fi. Your device will show a list of networks in range, each with a name (called the SSID) and a lock icon if it's encrypted.
Look for your own network name — the one you set up on your router, or the default name printed on the router itself. The default is usually something like "NETGEAR-5G" or "TP-Link-2.4G". If you see your network name, it has a lock icon next to it, which means it's encrypted and safe to join. If you see your network name without a lock icon, your router's encryption is turned off — go back to your router settings and turn it on before connecting any devices.
Do not connect to networks with names like "Free Airport Wi-Fi" or "Linksys" unless you're certain they belong to the business you're in. Attackers often create fake networks with common names to trick people into connecting. If you're unsure, ask an employee for the exact network name.
Entering the password correctly
Tap or click on your network name. Your device will ask for the password. This is the Wi-Fi password you set on your router — not your email password or computer login password. If you don't remember it, you can find it by logging into your router's admin page (usually 192.168.1.1 in your browser) or by looking at the sticker on the back of the router itself, which often has a default password printed on it.
Type the password exactly as it is. Wi-Fi passwords are case-sensitive, meaning "MyPassword" is different from "mypassword". If you make a typo, your device will say "Incorrect password" and you'll have to try again. Most devices let you tap an eye icon to see what you're typing so you can catch mistakes.
After you enter the password, your device connects to the router. You should see a checkmark next to the network name, and your device will show you're connected. If the connection fails twice, restart your router by unplugging it for 30 seconds, plugging it back in, and waiting two minutes for it to fully start up.
What to do if you see "connected but no internet"
Sometimes your device connects to the router but can't reach the internet. This usually means the router itself isn't connected to your internet service provider (ISP), or the router needs to be restarted. Unplug the router for 30 seconds, plug it back in, and wait two minutes. Then try opening a website to see if the internet works.
If it still doesn't work, restart your modem — the device your ISP provided that connects to the wall outlet and the router. Unplug it for 30 seconds, plug it back in, and wait two minutes. If you have a combined modem-router unit, unplugging that one device restarts both.
If the internet still doesn't work after restarting both devices, contact your ISP's support line. They can check whether your account is active and whether there's an outage in your area.
Connecting multiple devices to the same network
Every device in your home can connect to the same Wi-Fi network using the same password. Your phone, laptop, tablet, and smart TV all use the same network name and password. Once you've entered the password on a device once, most devices will remember it and reconnect automatically the next time they're in range.
If you have a router that broadcasts both 2.4 GHz and 5 GHz bands, you may see two network names — one ending in "-2.4G" and one ending in "-5G". The 5 GHz band is faster but has shorter range; the 2.4 GHz band is slower but reaches farther. You can connect different devices to whichever band works best for them, or set your router to broadcast both under the same name so devices pick the best one automatically.
If you add a new device and it doesn't see your network, make sure the device's Wi-Fi is turned on. On phones, swipe down from the top of the screen to open quick settings and tap the Wi-Fi icon. On laptops, click the Wi-Fi icon in the system tray or menu bar. If the network still doesn't appear, move the device closer to the router — it may be out of range.
Removing networks you no longer use
Your device remembers every network you've ever connected to and will try to reconnect automatically when it's in range. This is convenient for your home network, but it's a security problem for networks you no longer use. If you connected to a coffee shop's Wi-Fi six months ago and then moved away, your phone will still try to reconnect if you pass by that coffee shop again — and if someone has set up a fake network with that same name, your phone might connect to the fake one instead.
On iPhone, go to Settings, tap Wi-Fi, find the network you want to forget, tap the info icon (i) next to it, and tap "Forget This Network". On Android, long-press the network name and tap "Forget". On Windows, go to Settings, click Network & Internet, scroll down to "Manage known networks", find the network, click it, and click "Forget". On Mac, go to System Settings, click Wi-Fi, click "Manage", find the network, click it, and click the minus button.
Keep your home network and any networks you use regularly. Forget networks at places you don't go anymore, hotels you've visited, or public Wi-Fi you used once.
Why you should avoid public Wi-Fi without extra protection
Public Wi-Fi at airports, coffee shops, and libraries is usually unencrypted, which means anyone nearby can see the data you send. This includes passwords, emails, and banking information. Even encrypted public networks are run by people you don't know, who could be logging your activity.
If you must use public Wi-Fi, avoid logging into email, banking, or social media accounts. If you need to check your bank balance or send an important email, use your phone's cellular data instead — it's encrypted end-to-end by your phone company. If you regularly work in coffee shops or travel, consider using a VPN (virtual private network), which encrypts all your data before it leaves your device, even on unencrypted networks. A VPN costs $5 to $15 per month and works on phones, tablets, and laptops.
Never connect to a public network that asks for your email address or credit card information before you can use it, unless you're certain it's run by the business itself. These "captive portals" are often used by attackers to collect information.
Troubleshooting connection problems
If your device keeps disconnecting from Wi-Fi, the problem is usually one of three things: the router is too far away, the router is overloaded, or there's interference from other devices.
Move closer to the router to see if the connection stabilizes. If it does, you need to move the router to a more central location in your home, or buy a Wi-Fi extender to reach farther. If you're already close to the router, restart it by unplugging for 30 seconds and plugging back in. If restarting doesn't help, log into your router's admin page and check how many devices are connected — if there are more than 20, some devices may be dropping off because the router is overloaded. You can disconnect devices you're not using, or upgrade to a newer router that handles more connections.
Interference from microwaves, cordless phones, and baby monitors can also disrupt Wi-Fi on the 2.4 GHz band. If you have a dual-band router, try connecting to the 5 GHz network instead. If you only have 2.4 GHz, move the router away from these devices or ask your ISP about upgrading to a newer router.
Frequently Asked Questions
Can someone hack my Wi-Fi if they know the password?
If they know the password, they can connect to your network and see other devices on it. They cannot see your passwords or emails unless they install software on your device. Change your Wi-Fi password if you've shared it with someone you no longer trust, or if you think someone has written it down.
What's the difference between 2.4 GHz and 5 GHz?
5 GHz is faster but doesn't reach as far through walls. 2.4 GHz is slower but has better range. Most modern routers broadcast both, and your device picks the best one automatically. If you're far from the router, you may only see the 2.4 GHz network.
Why does my device keep asking for the password even though I entered it?
You may have typed it wrong — Wi-Fi passwords are case-sensitive. Restart your router by unplugging it for 30 seconds. If that doesn't work, go into your router settings and check that the password is what you think it is. The password is usually on a sticker on the back of the router or in your router's admin page.
Is it safe to connect to a network that doesn't have a lock icon?
No. A network without a lock icon is unencrypted, meaning anyone nearby can see your data. Only connect to unencrypted networks if you're not sending any sensitive information. For any banking, email, or passwords, use an encrypted network or your phone's cellular data instead.
Can I connect to my neighbor's Wi-Fi?
Only if they give you permission and the password. Connecting to someone else's network without permission is illegal in most places. If you need internet access, ask your neighbor if they're willing to share, or contact your ISP about your own service.