https://github.com/aerogear/aerogear-unifiedpush-server/blob/master/jaxrs/src/main/java/org/jboss/aerogear/unifiedpush/rest/registry/applications/iOSVariantEndpoint.java#L47

endpoint is "ios"

but you declare it like "iOS" here (1) in endpoint urls and when doing it like that I've got 404 for couple of hours ... Very nasty bug. Rewrite that to lowercase in docs everywhere.

Thank you

(1) http://aerogear.org/docs/specs/aerogear-push-rest/Variants/iOS/