Our RegisteredForRemoteNotifications code broke because the token was retrieved with:
deviceToken.ToString().Trim(\'<\').Trim(\'>\').Replace(\" \", \"\
Convert NSData to String
var tokenStringBase64 =deviceToken.GetBase64EncodedString(NSDataBase64EncodingOptions.None);
Convert String to NSData
var deviceToken = new NSData(tokenStringBase64, NSDataBase64DecodingOptions.None);