Renew Your DHCP Lease Manually

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If you’re connected to a commercial Wi-Fi hot spot, say at a favorite coffee shop or restaurant, and you’re having problems getting onto the Internet, try renewing your DHCP lease. Tap on the Settings app and then tap Wi-Fi. Next, tap the blue arrow button for the network that you’re connected to, scroll down, and tap the Renew Lease button. This will tell the iPhone to grab an updated IP address, and possibly updated DNS info.

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