I am using a Nokia lumia 521 and am able to WiFi call on my personal WiFi network and some public restaurant/store WiFi. My state says unknown error state. Before having windows phone 8.1 Dev preview, I had the same problem except on a recent Dev update it stopped saying that WiFi call in had an SSL error on the live tile.
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Re: How can I solve a SSL WiFi calling issue? I have this problem whenever I go to my high school.
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