When an iPhone 12, 12 mini, 12 Pro or 12 Pro Max will not join Wi-Fi, work through Apple's article in order: confirm Wi-Fi is on and Airplane Mode is off, check that Connectivity Assist is off if the setting is dimmed and restart, remove any VPN or security software as a test, then check the router by testing other devices, updating its firmware, joining 5 GHz instead of 2.4 GHz and restarting router and modem. Reset network settings only if the rest fails. All four models support dual-band Wi-Fi 6 according to GSMArena.
Differential
Likely causes of “Apple iPhone 12 family will not connect to Wi-Fi or keeps disconnecting”, and how to tell them apart
- 1
Wi-Fi off or Airplane Mode on
What separates it No networks are listed or the switch is gray
How to confirm Turn Wi-Fi on and Airplane Mode off; restart if the setting is dimmed
- 2
A VPN or security app
What separates it Wi-Fi works after the software is removed because of a VPN or security app
How to confirm Apple says to uninstall it, restart and test; contact its provider if you must keep it
- 3
A hidden or unsupported network
What separates it The network name does not appear in the list of available networks on the phone
How to confirm Apple says it might be hidden or not meet its recommendations; ask the network's manager or your ISP
- 4
The router
What separates it Other devices cannot connect either because of a router fault
How to confirm Update the firmware, join 5 GHz instead of 2.4 GHz and restart router and modem
- 5
A corrupted network configuration
What separates it It connects but no pages load, even after other steps
How to confirm Reset network settings, then rejoin each network, with the right password
Before you touch a setting
Record this first — changing settings destroys the evidence
- Which model you have and its iOS version
- Whether other devices and other networks work
- The router make, model and firmware, and which band it uses
Try in this order
0 of 7 completedCheck the switches
ReversibleSettings, Wi-Fi is on, Airplane Mode is off, and the network shows a blue checkmark when joined.
Check Connectivity Assist
ReversibleApple says to make sure Connectivity Assist is off; if the Wi-Fi setting appears dimmed, restart the phone.
Test without VPN and security software
ReversibleTest without VPN and security software, by uninstalling it, restarting and testing Wi-Fi again, and then test again to see whether it helped.
Check the router
ReversibleTry other devices, update the router firmware, make sure you are in range and try 5 GHz instead of 2.4 GHz.
Restart router and modem
ReversibleRestart router and modem, by unplugging both, plugging them back in and waiting for the connection to return.
Reset network settings
ReversibleReset network settings, by opening Settings, General, Transfer or Reset iPhone, Reset, Reset Network Settings.
Try another location
ReversibleTry another location, and if the phone cannot connect to any Wi-Fi network anywhere, contact Apple.
Model-specific
What is true of this model and not of its siblings
- Wi-Fi and Bluetooth
- Dual-band Wi-Fi 6 with hotspot on all four models, per GSMArena; Bluetooth 5.0.
- Modem
- GSMArena notes Apple uses a Qualcomm X55 modem in these phones; Apple's Wi-Fi article treats all four alike.
- Part numbers
- Record the router's brand and model, since there is no phone part number involved; the iPhone's own model number is under Settings, General, About.
- Tools and supplies
- A second device on the network, the router admin page and a flashlight to read the router label.
- Repair cost
- Wi-Fi faults are rarely a paid repair; if the antenna or board is at fault, Apple quotes it at service. iFixit lists $229 to $329 for iPhone 12 screens and $89 for batteries.
- Other models this page answers
- These steps also fit the iPhone 12 mini, iPhone 12 Pro, iPhone 12 Pro Max.
Stop boundary
When this stops being a self-service repair
- !If the phone cannot connect to any network in any place after a network reset, contact Apple
- !If only one network fails on every device, contact the router's maker or your internet provider
- !If other devices also have no internet, Apple says it may be an outage and to contact your ISP
Evidence ledger
Sources behind this answer
Where the manufacturer's article stops. Capacity, charge and display figures come from GSMArena's spec sheets and lab tests, which are third-party measurements that Apple does not publish.
Settings, VPN, router, network reset and ISP steps.
Battery, charging, display, chip, storage, Wi-Fi and model numbers of the iPhone 12.
Battery, display, storage and Wi-Fi of the iPhone 12 Pro.
Exact questions
Common questions
Does the iPhone 12 support Wi-Fi 6?+
Yes. GSMArena lists 802.11 a/b/g/n/ac/6 dual-band with hotspot for all four models.
Why does Wi-Fi say no internet?+
Try other devices on the network; if they fail too, Apple says there might be an outage and to contact your ISP.
Does resetting network settings delete photos?+
No. It removes network configurations only.
Why does Wi-Fi work at home but not at work?+
Managed networks can hide names or require configuration; Apple says to contact the network's manager rather than reset your phone.
Why does the iPhone 12 drop Wi-Fi on a mesh network?+
Phones can cling to a distant access point instead of moving to a nearer one. Restarting the router and modem, moving closer and joining the 5 GHz name as Apple suggests usually help; if it persists, see whether other devices behave the same.
What if the network is hidden?+
Apple says a network might be hidden by technology that blocks unauthorized devices. If you do not manage it, ask whoever does, or your internet provider, rather than resetting the phone.
Does a VPN really stop Wi-Fi?+
It can. Apple asks you to uninstall VPN and security software, restart and test, because a misbehaving profile can block traffic while Wi-Fi shows connected.
How can I tell if the fault is the phone or the network?+
Try the phone on a different Wi-Fi network in another place, and try another device on your own network. Apple says that if the phone cannot join any Wi-Fi network anywhere it should be checked by Apple, while a fault on one network only points to that router or your provider.