WiFi connection cut in standby

Iomeio wrote:

Hi, I have an iPhone 14 pro max. Randomly the phone cut the WiFi connection and do not receive notification like whatapp mail etc....

The phone do not loose the connection with the router but seems to go sleeping for some time when the screen is off. When the phone wakes up from sleeping in few minutes all the notifications come together.

This happen randomly and is rare.

Is not a problem router side because I try with many different routers.

( I'm not using always on display) Power save option disabled.

Is not a problem of settings.

The firm is iOS 16.1.1.

Is it a bug?

No, it’s a feature. All iPhones from the beginning of iPhone time 15 years ago disconnect from Wi-Fi 30 seconds after the phone screen locks, to preserve battery energy, unless the phone is connected to power. This is done because a Wi-Fi connection uses power continuously, whether data are transferring or not. Cellular connections use more energy, but only when actually sending data. There are a few exceptions:

• If you are streaming audio or video Wi-Fi will stay on
• If you receive a notification Wi-Fi will reconnect for a few seconds to process the notification
• And, I think (but I’m not sure) if an app uses Background App Refresh it can wake and use Wi-Fi; however very few apps actually do this

If you have notifications enabled for WhatsApp it should reconnect to Wi-Fi, but WhatsApp is a strange app in many ways. The router does not control the sleep time. It is the phone that disconnects 30 seconds after the screen sleeps.

You can experiment with this yourself using your computer. Open Terminal on a Mac, or CMD on Windows. Go to Settings/Wi-Fi, tap on the i next to your network name and write down the phone’s IP address.

Windows: Enter the command “ping -t the IP address you wrote down"

Mac: Enter the command “ping the IP address you wrote down"

To stop the display use CTRL+C

It will say it is offline if it doesn’t have a cellular data connection.