Problem with Wi-Fi on iPhone 5?

I have an iPhone 5 and it's really bad with connecting and staying connected to Wi-Fi. I know that the signal reaches upstairs because everyone else is able to use it fine and my laptop, which is usually in the same room as my phone, works just fine.
Whenever I go to a friend's place, the same thing happens. Can someone please help me? It's extremely frustrating.

Buy a new phone

There are at least two ways which have proven to fix the issue. The first method is to use the iPhone's settings as described below:

1. Open the Settings app on the iPhone and ensure Airplane Mode is disabled

Next, navigate to General > Reset and tap "Reset Network Settings"

Note - resetting network settings will remove all saved Wi-Fi passwords from the iPhone

Finally, restart the iPhone. To restart the iPhone press and hold both the Sleep and Home buttons until you see the iPhone screen go black

If this doesn't help and you still have the iPhone Wi-Fi switch greyed out, make sure to upgrade your iOS to the latest available version. Apple also recommends to use iTunes and restore the iPhone.

If your iPhone Wi-Fi radio is operational (e.g. Not greyed out), and you can't connect to a Wi-Fi network, follow the below procedure:

1. Ensure that you are trying to connect to the right Wi-Fi network and that you are entering the correct password

Note - Wi-Fi network passwords are case-sensitive and could contain numbers and special characters

If this does not solve the issue, reset the iPhone network settings by navigating to General > Reset > Reset Network Settings.

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