Fix iPhone 15 and 15 Plus WiFi Not Working or Keeps Disconnecting

The much-awaited Apple iPhone 15 series has just landed, and users can’t wait to test it. As always, the latest lineup brings significant improvements over the last generation. But, the talk of the town is the addition of the USB-C port on all iPhone 15 models.

The iPhone 15 has solid hardware and buttery smooth software, iOS 17. However, not everything is sunshine and rainbows. Even the best tech can run into problems, and so can the latest iPhones. If your iPhone 15 or 15 Plus can’t connect to WiFi or the WiFi does not work, this guide has everything you need to know.

In this guide, I will share effective troubleshooting techniques to resolve WiFi issues on your iPhone 15 or 15 Plus. Apply them and start using high-speed internet.

How to Fix iPhone 15 and 15 Plus WiFi Not Connecting or Working Issue?

You don’t expect Apple iPhones to face problems, but they can. They are still a piece of tech. However, it would be best if you didn’t get worried as there are effective solutions to resolve them.

Below are some WiFi troubleshooting methods. One of them should fix your iPhone. So, keep applying the solutions until the problem is resolved. By the end of this article, you should have a working WiFi connection on your iPhone.

1. Toggle Off the Airplane Mode

First and foremost, check if you have accidentally left the Airplane mode in an enabled state. When it is turned on, the WiFi will be disabled automatically.

You can turn off the Airplane mode using the Control Center. It can be accessed by swiping down from the upper right corner of your screen.

Another way to do it is via the Settings app. Open it and toggle off the switch Next to Airplane mode.

After turning off the Airplane mode, turn on WiFi and wait for your iPhone to connect to a network automatically. If it doesn’t, manually do it by tapping the network name.

2. Move Close to Your Router

A WiFi router is a short-range device. You must be within its range to access the internet. Other electrical appliances can cause interference with the WiFi signal, making the network inaccessible. Place the router where there are fewer electrical devices.

While troubleshooting the WiFi problem, get close to your router to ensure that a weak signal is not causing the trouble. Even now, if the WiFi is not working on your iPhone 15 or 15 Plus, there could be glitches, more on this in the next solution.

3. Restart Your iPhone

Restarting the device is a quick fix for WiFi and other network problems on iPhones. It can fix network glitches that could be causing WiFi issues.

To restart your iPhone 15 or 15 Plus, press and hold the side button and any of the volume buttons until the power slide appears. Drag it to turn off the device. After a few seconds, press and hold the side button again to turn on your device.

After restarting, turn on the WiFi on your iPhone. It will try to establish the connection again. Check your internet after a successful connection.

4. Force Restart Your iPhone

If the normal restart method (in the previous solution) did not work, perform a forced restart instead. This method can fix serious bugs on your phone and is recommended when a normal reboot doesn’t work.

Don’t worry about your data; performing a forced restart does not cause data loss. Your files and apps will remain safe.

Steps to perform force restart on iPhone:

1. Press and quickly release the volume up button.
2. Press and quickly release the volume down button.
3. Press and hold the side button until you see the Apple logo on your screen.

Connect to your WiFi network and start accessing your favorite websites.

5. Forget the Network and Rejoin

The WiFi credentials may have changed since your last successful connection to the network. An effective solution here is to forget the network and join it again. It will refresh the network details on your iPhone.

Here are the steps involved in the process:

1. Launch the Settings app on your iPhone.
2. Tap the “i” button next to the connected network name. Click Forget This Network and tap on Forget.
3. If you’re not connected to the network, tap on Edit to see the saved WiFi networks list. Tap on the “i” button next to your network. Click Forget This Network and tap on Forget to confirm.
4. Restart your iPhone.
5. Go to Settings -> Wi-Fi.
6. Tap on your WiFi network name.
7. Enter the password and click Join.

If your iPhone asks you to enter the WiFi password repeatedly, you’re probably entering the wrong one. Double-check the password and pay special attention to letters as they are case-sensitive.

If your iPhone keeps saying incorrect password, the credentials may have changed. Log into your router’s settings to see the correct password.

6. Disable WiFi Assist

iPhones have an intelligent WiFi Assist feature that can automatically switch from WiFi to mobile data when the WiFi connection is poor. If your connection is unstable or slow, your phone will use mobile data instead. It gives the impression that the WiFi is not working. Turn it off and check if the issue is resolved.

Here’s how to do it:

1. Launch the Settings app on your iPhone.
2. Tap on Mobile Data.
3. Please scroll down to the Wi-Fi Assist option and disable it.

The WiFi Assist feature helps maintain a strong and reliable connection. I recommend turning it on after the issue has been resolved.

7. Perform a Network Reset

Incorrect network settings could also affect WiFi networks. You can perform a network reset to restore network settings to default. But, it will remove saved WiFi networks and paired Bluetooth devices.

Here are the steps involved in the process:

1. Launch the Settings app on your iPhone.
2. Please scroll down to General and tap on it.
3. Select Transfer or Reset iPhone and tap on Reset.
4. Click Reset Network Settings.
5. Enter your passcode and click Reset Network Settings.

Now, go to Settings > Wi-Fi, select your WiFi network, and enter the correct password to join the network. The WiFi should work on your iPhone.

8. Disable the VPN

If your iPhone is connected to a VPN, disconnect it from the VPN server. A VPN routes your internet through tunnels for strong security and encryption. If the connected VPN server is on a high load or faces technical difficulties, it can lead to a degraded or interrupted internet connection.

While troubleshooting WiFi problems on your iPhone, I highly recommend you disable the VPN. After doing this, turn off your WiFi and turn it on again. Connect to the network and check if you can access the internet.

9. Reboot Your Router

Your iPhone shouldn’t be blamed entirely for all WiFi issues until you’ve checked every aspect of your WiFi router. If your iPhone can’t connect or use a WiFi connection, it could be a fault of glitches or a temporary bug. Rebooting the router should resolve it.

Rebooting your WiFi router is a quick way of resolving many WiFi issues. Doing this will force the device to connect to the network again and fix glitches that could trigger the problem.

There are many ways of rebooting a router. An easy way to do this is by unplugging the router’s power cable for a minute and plugging it back into the socket. Now, connect your iPhone to the network and check if your connection is restored.

10. Check These Router’s Settings

Most routers have the option to set a maximum number of concurrent devices. If the maximum limit is already reached, you won’t be able to connect to the network.

You can check the maximum device limit from the router’s settings. You can either increase the limit or disconnect a connected device.

If you are still having trouble connecting to your WiFi, check if your iPhone is on the blocked list. A blocked device can’t connect or use the connection. Using a connected device, access the router’s settings page and review the blocked devices list.

To access the router’s login page, follow these steps:

1. Grab a device (phone or laptop) connected to the WiFi network.
2. Open a browser (Google Chrome, Firefox, or Safari).
3. Find your router’s IP address (it’s printed on the bottom of your router). Usually, it’s either 192.168.0.1 or 192.168.2.1 for most routers.
4. In a browser, type the router’s IP address in the address bar and press Enter.
5. You’ll see the router’s login page. Enter the credentials.
6. Find the blocked devices list and remove your device (if listed).

11. Test Your WiFi Connection on Another Device

If you tried the solutions mentioned above but to no avail, check if you can access the internet on another device. If you can, your iPhone is causing trouble. You can update the device or do a factory reset, as mentioned in the next solutions.

If you can’t access the internet (via WiFi) on any device, the router could be faulty, or your ISP is facing technical issues.

12. Update Your iPhone

Your iPhone may have a software bug causing WiFi problems. Try updating your device to check if the latest software includes a fix for WiFi issues. Generally, the software update contains various fixes, improvements, and new features. Hence, you must be regularly updating your iPhone.

To update your iPhone, launch the Settings app, tap on General, and click Software Update. Download and install pending updates (if available).

13. Restore Your iPhone to Factory Settings

If WiFi is still not connecting or working on your iPhone, do a factory reset. It will delete everything on your iPhone, including photos, videos, documents, and downloaded apps & games. Hence, take a complete backup of your important data and then proceed (if you want to).

1. Open the Settings app and select General.
2. Click Transfer or Reset iPhone.
3. Tap on Erase All Content and Settings.
4. Click Continue and confirm your lock screen.
5. Wait for the backup to complete. You can skip it by tapping on Skip Backup.
6. Enter your Apple ID password and click Turn Off.
7. Tap on Erase iPhone.

After the factory reset is done, set up your iPhone again. The WiFi issues should have been resolved.

14. Contact Apple Support

If you can use your WiFi on other devices but struggle with your iPhone 15 or 15 Plus, contact Apple Support as a last resort. They might help you with additional troubleshooting steps.

However, if the WiFi is not working on any of your devices, that is an ISP fault. Contact your internet service provider (ISP) to get it fixed.

Wrapping It Up

The Apple iPhone 15 and iPhone 15 Plus run smoothly. But, at times, it can get into trouble. If you can’t use WiFi on your Apple iPhone, there are effective techniques to deal with it. Start by checking the Airplane mode, restarting your device, and then move to complex solutions such as checking your router’s settings or resetting your iPhone. You should be able to fix WiFi problems on your iPhone.