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My IPad(9.7) Ipad6,11 Update 15.7 Lost Wifi and slowly

hi APPLE , my Ipad at update 15.7 and got error can't connect to wifi and opening apps is very slow. My ipad bought at Taiwan store and I'm Vietnamese, when restoring with iturn software on windows computer error 4045 occurred. hope apple support guide me to fix the error


Posted on Oct 15, 2022 4:51 AM

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Question marked as Top-ranking reply

Posted on Oct 15, 2022 5:16 AM

Start here:

If your iPhone, iPad, or iPod touch won’t connect to a Wi-Fi network - Apple Support


…and here:

Recommended settings for Wi-Fi routers and access points - Apple Support


If your WiFi has been set-up according to Apple’s recommended settings, WiFi and Internet connection difficulties are usually an indication that your device does not have a routable IP Address - your IP Address usually being assigned by DHCP. When this occurs, your iPad may only have a self-assigned link-local IP address that begins 169.254.x.x.


If you have a VPN App or profiles installed, or a security App such as Norton, these may be interfering with DHCP and preventing your device from obtaining a valid IP Address for your iPhone hotspot - or the WiFi network to which you are attempting to connect. The resolution is usually simple; if installed, you may only need to temporarily disable or remove the Security App and/or VPN.


DHCP is frequently used to automatically obtain an IP Address. Until your iPad has a valid IP Address to connect to your network, you will not have an internet connection. Disabling or removing VPN and/or the offending security App should allow DHCP to operate normally - allowing connection to your network and the internet.


If this resolves your issue, the VPN and/or security App can be reinstated after the connectivity problem has been resolved.

1 reply
Question marked as Top-ranking reply

Oct 15, 2022 5:16 AM in response to phanxicotrancuong

Start here:

If your iPhone, iPad, or iPod touch won’t connect to a Wi-Fi network - Apple Support


…and here:

Recommended settings for Wi-Fi routers and access points - Apple Support


If your WiFi has been set-up according to Apple’s recommended settings, WiFi and Internet connection difficulties are usually an indication that your device does not have a routable IP Address - your IP Address usually being assigned by DHCP. When this occurs, your iPad may only have a self-assigned link-local IP address that begins 169.254.x.x.


If you have a VPN App or profiles installed, or a security App such as Norton, these may be interfering with DHCP and preventing your device from obtaining a valid IP Address for your iPhone hotspot - or the WiFi network to which you are attempting to connect. The resolution is usually simple; if installed, you may only need to temporarily disable or remove the Security App and/or VPN.


DHCP is frequently used to automatically obtain an IP Address. Until your iPad has a valid IP Address to connect to your network, you will not have an internet connection. Disabling or removing VPN and/or the offending security App should allow DHCP to operate normally - allowing connection to your network and the internet.


If this resolves your issue, the VPN and/or security App can be reinstated after the connectivity problem has been resolved.

My IPad(9.7) Ipad6,11 Update 15.7 Lost Wifi and slowly

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