2. Or turn on the wireless wifi signal, ignore and remove the connected wifi signal, and then re-enter the password to verify the wifi signal.
3. After the above operation, the iPhone still cannot connect to the wireless network signal, which indicates that the router may be caused by a problem in the setting, then the next is to restart it, and check whether the network cable interface of the router is loosened, or reset the router wifi signal.
4. If the wifi connection is still not normal after setting, you can go to the iPhone restore page, click Restore network Settings, and then try to connect to the wifi wireless network.