I'm trying to connect to a wifi network using 4 phones.
1 phone uses Android 4.2.2, and the others are using Android 6 and 5.0.1.
The one with the Android 4.2.2, everything's work fine.
On the others, I get an exclamation mark next to the WiFi icon on the status bar, and no communication.
Are there any WiFi restrictions between Android 4.2.2 and Android 5.0.1, 6?