Public Wifi connection will be very dangerous and can damage iPhone WiFi connection, unable to connect to the network.. A recent discovery shows that, when connecting to Wifi with Wifi name is a sequence of % characters, iPhone lose Wifi connection feature, even if you restart the phone.
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There is a Wifi network naming error that causes iPhone to fail WiFi connection
When naming WIFI for Modem/Router you must not name it “%p%s%s%s%n”. Or if you connect to FIWI at a cafe, bookstore, hotel … if you see the name Wifi “%p%s%s%s%n” you absolutely are not connected, otherwise you do not want iPhone broken WiFi connection.
The above string of characters can seriously affect any iPhone user. According to two sites BleepingComputer and AppleInsider, Carl Shou has discovered a bug named WiFi ‘error’ on iOS devices. On the phone will be Wi-Fi connection lost. When it fails, you can only restore the network settings on your phone by going to Settings > General > Reset > Reset Network Settings, but this will lose all previously saved Wifi passwords. You have to spend time asking for Wifi passwords in familiar places that you usually connect to.
After connecting to my iPhone’s Wifi with the SSID (Wifi name) named: “%p%s%s%s%s%n”, iPhone will have permanently disabled Wi-Fi function, you cannot turn it ON. No matter how you reboot or change the SSID, it doesn’t fix this error.
At this time, it is not clear why the above character string affects all iOS devices in the world. Security experts speculate that it could be a string format errori. In a word, iOS can confuse characters % with commands and programming variables.
In 2018, iOS also appeared a bug with the . icon strange characters, when receiving text messages with characters all iPhones hang. However, this time Wi-Fi error problem is very rare. Those who want to troll, just need 1 ESP8266 board or Create Hotspot Free Wifi broadcast on Windows and name it “%p%s%s%s%s%n”, anyone who connects to it will lose the Wifi connection function.
Therefore, you absolutely do not connect to strange, weird or untrusted Wifi, otherwise it will be easy to steal data or damage your phone.
