There are several reasons why your iPhone might keep disconnecting from WiFi. Here are a few possibilities:

Your iPhone is out of range of the WiFi network: Make sure that your iPhone is close enough to the router to maintain a strong signal.

The router’s firmware is outdated: If the router’s firmware is out of date, it can cause compatibility issues with your iPhone. Contact your internet service provider (ISP) to see if there is an update available.

Interference from other devices: Other electronic devices in your home, such as microwaves or cordless phones, can interfere with your iPhone’s connection to the WiFi network.

A problem with the router: Sometimes routers can malfunction, which can cause connectivity issues for all devices connected to it.

Your iPhone’s software is outdated: Make sure that your iPhone is running the latest version of iOS, as updates often include bug fixes for connectivity issues.

Overloaded network: If many people are connected to the same network, it can cause slow speeds, internet congestion or disconnections.

If none of those solutions fix the problem, try forgetting the WiFi network and then reconnecting to it, and disabling/enabling the wifi on your device. Also could be worth checking the Router’s settings and removing any unecessary devices off of the network. If none of these solutions work, you might consider contacting your ISP for further assistance.

Iphone WiFi troubleshoot steps

If you’re experiencing issues with WiFi on your iPhone, there are a few things you can try to troubleshoot the problem.

Restart your iPhone: Sometimes, simply restarting your iPhone can fix WiFi issues. Press and hold the power button (located on the right side of the device) until you see the “slide to power off” slider appear. Once your phone is off, press and hold the power button again until the Apple logo appears.

Restart your router: Unplug your router from the power source for a few seconds, then plug it back in. This can help resolve any issues that may be caused by a temporary glitch in the router.

Check for updates: Make sure your iPhone and router are up to date with the latest software updates. You can check for updates by going to Settings > General > Software Update on your iPhone, and checking for updates on your router’s administrative page.

Forget the WiFi network: Go to Settings > WiFi, find the network you’re having trouble with, and tap the “Forget This Network” button. Then, try reconnecting to the network.

Reset Network Settings: If above methods doesn’t work, resetting your iPhone’s network settings can help fix WiFi issues. Go to Settings > General > Reset > Reset Network Settings. This will erase all previously saved WiFi networks and passwords, so you’ll need to enter them again.

Turn on and off Airplane Mode: Sometimes turning on and off airplane mode can fix wifi related issues. Just go to Settings > Airplane Mode, toggle it on. Wait for few seconds and turn it off again.

Check the distance from the router: Make sure your iPhone is not too far away from your router, or that there aren’t any walls or other obstacles that might be interfering with the signal.

Contact Apple support: If none of the above solutions work, you may want to contact Apple support for further assistance. They can provide you with additional troubleshooting steps, or even arrange for a repair if needed.

Please note that, if your wifi issue is related to your internet service provider and not your iphone, then it’s best to contact them for support