goto [Settings] > Network > Your Wifi Network > Advanced Settings > DNS Settings
and set it to manual
then set primary DNS to 212.47.229.76 (The HENKAKU DNS)
And secondary DNS to 8.8.8.8 (This is Google DNS.)
to check if its working goto System Update > Update via WiFi it should say the latest version is already installed!
after that just goto PSN and it will work
-SilicaAndPina.
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