If your iPhone drops the Wifi network suddenly, you an check if the signal is strong enough to start with. If the wireless connection issue is related to the router and the internet service provider, so if the signal is weak, you can move close to the Wifi router and try again.
But if the Wifi signal is strong and working perfectly, and your iPhone 5 or 5S still drops the Internet connection, you can try the following steps.
Solution to Signal Dropping Suddenly Wireless Connection Issue of iPhone 5 or 5S
Go to Settings then WiFi and Tap on the arrow nearby the troubled WiFi network then Tap “Renew Lease” to check if the Wireless Connection Issue is fixed.
If it still does not fix, you can tap on “Forget this Network” instead of “Renew Lease” to fix the issue, but using this setting, requires you to reconfigure the WiFi network on your iPhone 5 or 5S by setting the WiFi password.
If you are still facing the Wireless Connection Issue of signal dropping suddenly, you can try to reset the iPhone 5 or 5S’s network by going to Settings then General then Reset then Reset Network Settings.
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