i want to know that after switching off my static ip option in phone ,, why my wifi is not accessing ?

Re: lumia 540 network connectivity problem , after switching off the static ip 80 80

IP assignments are specific to each network, so ask the network admin of the network you are using what is required since not all are the same.
That said, if I change such a thing I may have to reboot then forget and re-join the networks.

Re: lumia 540 network connectivity problem , after switching off the static ip 80 80

Assuming your system still sees the SSID of the WiFi accesspoint, then you will need to change your network (WiFi) configuration to use DHCP to get a network address from the local router.

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