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Hi eskimo :I'm a developer who browse Apple Developer Forums.I want to ask you the question about captive portal.Now I use the WiFidog,a captive portal suite,to implement this function.I use some iPhone such as iPhone6,6s,SE,that could popup authentication page quickly(For example like attachment).However,I use iPhone7 and iPhone X that popup authentication page very slowly,which takes about 50 seconds.I guess there is the problem for Evaluate and hotspothelper.But I don't know how to solve the problem if I couldn't change the iPhone which is Customer-owned.Looking forward to receiving your reply.