diff --git a/cineio-peer-ios/cineio-peer-ios/CineLocalAnswerSDPObserver.m b/cineio-peer-ios/cineio-peer-ios/CineLocalAnswerSDPObserver.m
index 182c21e..10023d4 100644
--- a/cineio-peer-ios/cineio-peer-ios/CineLocalAnswerSDPObserver.m
+++ b/cineio-peer-ios/cineio-peer-ios/CineLocalAnswerSDPObserver.m
@@ -59,8 +59,7 @@ - (void)         peerConnection:(RTCPeerConnection *)peerConnection
 - (void) sendLocalDescription
 {
     NSLog(@"sendLocalDescription");
-
-    [[self.cinePeerClient getSignalingConnection] sendLocalDescription:[self.rtcMember getSparkId] description:self.localSdp];
+    [self.rtcMember localDescriptionReady];
 }
 
 // Called when setting a local or remote description.
diff --git a/cineio-peer-ios/cineio-peer-ios/CineLocalOfferSDPObserver.m b/cineio-peer-ios/cineio-peer-ios/CineLocalOfferSDPObserver.m
index efc43b7..b4730c0 100644
--- a/cineio-peer-ios/cineio-peer-ios/CineLocalOfferSDPObserver.m
+++ b/cineio-peer-ios/cineio-peer-ios/CineLocalOfferSDPObserver.m
@@ -61,10 +61,11 @@ - (void) sendLocalDescription
 {
     NSLog(@"sendLocalDescription");
 
-    [[self.cinePeerClient getSignalingConnection] sendLocalDescription:[self.rtcMember getSparkId] description:self.localSdp];
+    [self.rtcMember localDescriptionReady];
+
 }
 
-// Called when setting a local or remote description.
+// Called when setting a local description.
 - (void)               peerConnection:(RTCPeerConnection *)peerConnection
     didSetSessionDescriptionWithError:(NSError *)error
 {
@@ -75,10 +76,8 @@ - (void)               peerConnection:(RTCPeerConnection *)peerConnection
         NSAssert(NO, error.description);
         return;
     }
-    dispatch_async(dispatch_get_main_queue(), ^{
         NSLog(@"didSetSessionDescriptionWithError no error");
         [self sendLocalDescription];
-    });
 }
 
 @end
diff --git a/cineio-peer-ios/cineio-peer-ios/CinePeerConnectionManager.h b/cineio-peer-ios/cineio-peer-ios/CinePeerConnectionManager.h
index 3243bb1..9eb5f63 100644
--- a/cineio-peer-ios/cineio-peer-ios/CinePeerConnectionManager.h
+++ b/cineio-peer-ios/cineio-peer-ios/CinePeerConnectionManager.h
@@ -28,15 +28,15 @@
 
 - (void)configureICEServers:(NSArray *)configDicts;
 
-- (void)ensurePeerConnection:(NSString *)otherClientSparkUUID otherClientSparkId:(NSString *)otherClientSparkId offer:(BOOL)offer;
+- (void)ensurePeerConnection:(NSString *)otherClientSparkUUID otherClientSparkId:(NSString *)otherClientSparkId offer:(BOOL)offer support:(NSDictionary *)support;
 
-- (CineRTCMember*)getPeerConnection:(NSString *)otherClientSparkUUID otherClientSparkId:(NSString *)otherClientSparkId offer:(BOOL)offer;
+- (CineRTCMember*)getPeerConnection:(NSString *)otherClientSparkUUID otherClientSparkId:(NSString *)otherClientSparkId offer:(BOOL)offer support:(NSDictionary *)support;
 
 - (void)closePeerConnection:(NSString *)otherClientSparkUUID;
 
-- (void)handleOffer:(NSString *)otherClientSparkUUID otherClientSparkId:(NSString *)otherClientSparkId offer:(NSDictionary *)offer;
-- (void)handleAnswer:(NSString *)otherClientSparkUUID otherClientSparkId:(NSString *)otherClientSparkId answer:(NSDictionary *)answer;
-- (void)handleIce:(NSString *)otherClientSparkUUID otherClientSparkId:(NSString *)otherClientSparkId iceCandidate:(NSDictionary *)iceCandidate;
+- (void)handleIce:(NSString *)otherClientSparkUUID otherClientSparkId:(NSString *)otherClientSparkId iceCandidate:(NSDictionary *)iceCandidate support:(NSDictionary *)support;
+- (void)handleOffer:(NSString *)otherClientSparkUUID otherClientSparkId:(NSString *)otherClientSparkId offer:(NSDictionary *)offer support:(NSDictionary *)support;
+- (void)handleAnswer:(NSString *)otherClientSparkUUID otherClientSparkId:(NSString *)otherClientSparkId answer:(NSDictionary *)answer support:(NSDictionary *)support;
 
 @end
 
diff --git a/cineio-peer-ios/cineio-peer-ios/CinePeerConnectionManager.m b/cineio-peer-ios/cineio-peer-ios/CinePeerConnectionManager.m
index de45604..5d916fd 100644
--- a/cineio-peer-ios/cineio-peer-ios/CinePeerConnectionManager.m
+++ b/cineio-peer-ios/cineio-peer-ios/CinePeerConnectionManager.m
@@ -73,7 +73,7 @@ - (void)configureICEServers:(NSArray *)configDicts
     }
 }
 
-- (void)handleOffer:(NSString *)otherClientSparkUUID otherClientSparkId:(NSString *)otherClientSparkId offer:(NSDictionary *)offer
+- (void)handleOffer:(NSString *)otherClientSparkUUID otherClientSparkId:(NSString *)otherClientSparkId offer:(NSDictionary *)offer support:(NSDictionary *)support
 {
     NSLog(@"HANDLE OFFER");
 
@@ -82,7 +82,7 @@ - (void)handleOffer:(NSString *)otherClientSparkUUID otherClientSparkId:(NSStrin
     [[RTCSessionDescription alloc] initWithType:offer[@"type"]
                                             sdp:[CineRTCHelper preferISAC:sdpString]];
 
-    CineRTCMember *rtcMember = [self getPeerConnection:otherClientSparkUUID otherClientSparkId:otherClientSparkId offer:false];
+    CineRTCMember *rtcMember = [self getPeerConnection:otherClientSparkUUID otherClientSparkId:otherClientSparkId offer:false support:support];
     NSLog(@"GOT member");
 
     RTCPeerConnection* conn = [rtcMember getPeerConnection];
@@ -94,20 +94,18 @@ - (void)handleOffer:(NSString *)otherClientSparkUUID otherClientSparkId:(NSStrin
 
 }
 
-- (void)handleAnswer:(NSString *)otherClientSparkUUID otherClientSparkId:(NSString *)otherClientSparkId answer:(NSDictionary *)answer
+- (void)handleAnswer:(NSString *)otherClientSparkUUID otherClientSparkId:(NSString *)otherClientSparkId answer:(NSDictionary *)answer support:(NSDictionary *)support
 {
     NSLog(@"HANDLE ANSWER");
 
-    CineRTCMember *rtcMember = [self getPeerConnection:otherClientSparkUUID otherClientSparkId:otherClientSparkId offer:false];
+    CineRTCMember *rtcMember = [self getPeerConnection:otherClientSparkUUID otherClientSparkId:otherClientSparkId offer:false support:support];
     NSLog(@"GOT member");
 
     NSString* sdpString = answer[@"sdp"];
     [rtcMember setRemoteAnswerAndSetIfIceIsComplete:sdpString];
-
-
 }
 
-- (void)handleIce:(NSString *)otherClientSparkUUID otherClientSparkId:(NSString *)otherClientSparkId iceCandidate:(NSDictionary *)iceCandidate
+- (void)handleIce:(NSString *)otherClientSparkUUID otherClientSparkId:(NSString *)otherClientSparkId iceCandidate:(NSDictionary *)iceCandidate support:(NSDictionary *)support
 {
     NSLog(@"disregarding ice candidates, I do not support trickle ice");
 
@@ -132,22 +130,22 @@ - (void)handleIce:(NSString *)otherClientSparkUUID otherClientSparkId:(NSString
 
 
 
-- (void)ensurePeerConnection:(NSString *)otherClientSparkUUID otherClientSparkId:(NSString *)otherClientSparkId offer:(BOOL)offer
+- (void)ensurePeerConnection:(NSString *)otherClientSparkUUID otherClientSparkId:(NSString *)otherClientSparkId offer:(BOOL)offer support:(NSDictionary *)support
 {
-    [self getPeerConnection:otherClientSparkUUID otherClientSparkId:otherClientSparkId offer:offer];
+    [self getPeerConnection:otherClientSparkUUID otherClientSparkId:otherClientSparkId offer:offer support:support];
 }
 
-- (CineRTCMember*)getPeerConnection:(NSString *)otherClientSparkUUID otherClientSparkId:(NSString *)otherClientSparkId offer:(BOOL)offer
+- (CineRTCMember*)getPeerConnection:(NSString *)otherClientSparkUUID otherClientSparkId:(NSString *)otherClientSparkId offer:(BOOL)offer support:(NSDictionary *)support
 {
     CineRTCMember *member = [self.rtcMembers objectForKey:otherClientSparkUUID];
     if (member != nil) {
         [member setSparkId:otherClientSparkId];
         return member;
     }
-    return [self createPeerConnection:otherClientSparkUUID otherClientSparkId:otherClientSparkId offer:offer];
+    return [self createPeerConnection:otherClientSparkUUID otherClientSparkId:otherClientSparkId offer:offer support:support];
 }
 
-- (CineRTCMember*)createPeerConnection:(NSString *)otherClientSparkUUID otherClientSparkId:(NSString *)otherClientSparkId offer:(BOOL)offer
+- (CineRTCMember*)createPeerConnection:(NSString *)otherClientSparkUUID otherClientSparkId:(NSString *)otherClientSparkId offer:(BOOL)offer support:(NSDictionary *)support
 {
     NSLog(@"creating new peer connection: %@", otherClientSparkUUID);
     CineRTCMember *member = [[CineRTCMember alloc] init];
@@ -157,6 +155,12 @@ - (CineRTCMember*)createPeerConnection:(NSString *)otherClientSparkUUID otherCli
     [member setSparkUUID:otherClientSparkUUID];
     NSLog(@"set spark uuid");
 
+    [member setSupport:support];
+    NSLog(@"created set support");
+
+    [member setSignalingConnection:[self.cinePeerClient getSignalingConnection]];
+    NSLog(@"set signaling connection");
+
 
     CinePeerObserver *observer = [[CinePeerObserver alloc] init];
     NSLog(@"created observer");
diff --git a/cineio-peer-ios/cineio-peer-ios/CinePeerObserver.m b/cineio-peer-ios/cineio-peer-ios/CinePeerObserver.m
index 880b948..1d0cce3 100644
--- a/cineio-peer-ios/cineio-peer-ios/CinePeerObserver.m
+++ b/cineio-peer-ios/cineio-peer-ios/CinePeerObserver.m
@@ -13,6 +13,7 @@
 #import "CineSignalingConnection.h"
 #import "RTCMediaStream.h"
 #import "RTCPeerConnectionDelegate.h"
+#import "RTCPeerConnection.h"
 
 @interface CinePeerObserver () <RTCPeerConnectionDelegate>
 @property (nonatomic, weak) CineRTCMember* rtcMember;
@@ -132,6 +133,7 @@ - (void)peerConnection:(RTCPeerConnection *)peerConnection
 {
     NSLog(@"iceGatheringChanged");
     if (newState == RTCICEGatheringComplete) {
+//        peerConnection.localDescription
         NSLog(@"iceGatheringChanged complete");
         [self.rtcMember markIceComplete];
     }
@@ -140,8 +142,14 @@ - (void)peerConnection:(RTCPeerConnection *)peerConnection
 - (void)peerConnection:(RTCPeerConnection *)peerConnection
        gotICECandidate:(RTCICECandidate *)candidate
 {
-    NSString* sparkId = [self.rtcMember getSparkId];
-    [[self.cinePeerClient getSignalingConnection] sendIceCandidate:sparkId candidate:candidate];
+    if ([self.rtcMember supportsTrickleIce]) {
+        NSLog(@"gotICECandidate and sending: %@", candidate);
+
+        NSString* sparkId = [self.rtcMember getSparkId];
+        [[self.cinePeerClient getSignalingConnection] sendIceCandidate:sparkId candidate:candidate];
+    }else {
+        NSLog(@"gotICECandidate but not sending: %@", candidate);
+    }
 
     //    //NSLog(@"gotICECandidate: %@", candidate);
     //    dispatch_async(dispatch_get_main_queue(), ^{
diff --git a/cineio-peer-ios/cineio-peer-ios/CineRTCMember.h b/cineio-peer-ios/cineio-peer-ios/CineRTCMember.h
index 0f31eca..0e853bd 100644
--- a/cineio-peer-ios/cineio-peer-ios/CineRTCMember.h
+++ b/cineio-peer-ios/cineio-peer-ios/CineRTCMember.h
@@ -14,14 +14,19 @@
 
 //Cine Peer SDK
 @class CinePeerObserver;
+@class CineSignalingConnection;
 
 @interface CineRTCMember : NSObject
 
+- (void)setSupport:(NSDictionary *)support;
 - (void)setSparkId:(NSString *)sparkId;
+- (void)setSignalingConnection:(CineSignalingConnection *)signalingConnection;
+
+- (BOOL)supportsTrickleIce;
 
 - (void) markIceComplete;
 - (void)setRemoteAnswerAndSetIfIceIsComplete:(NSString *)remoteAnswer;
-
+- (void)localDescriptionReady;
 - (NSString *)getSparkId;
 
 - (void)setSparkUUID:(NSString *)sparkUUID;
diff --git a/cineio-peer-ios/cineio-peer-ios/CineRTCMember.m b/cineio-peer-ios/cineio-peer-ios/CineRTCMember.m
index 82fd6ea..71c6451 100644
--- a/cineio-peer-ios/cineio-peer-ios/CineRTCMember.m
+++ b/cineio-peer-ios/cineio-peer-ios/CineRTCMember.m
@@ -13,6 +13,7 @@
 #import "CineRemoteAnswerSDPObserver.h"
 #import "CineRTCHelper.h"
 #import "RTCSessionDescription.h"
+#import "CineSignalingConnection.h"
 
 // WebRTC includes
 #import "RTCPeerConnection.h"
@@ -25,8 +26,11 @@ @interface CineRTCMember ()
 @property (nonatomic, strong) RTCPeerConnection* peerConnection;
 @property (nonatomic, strong) CinePeerObserver* peerObserver;
 @property (nonatomic, strong) NSString* remoteAnswer;
+@property (nonatomic, strong) NSDictionary* support;
+@property (nonatomic, strong) CineSignalingConnection* signalingConnection;
 
 @property BOOL iceGatheringComplete;
+@property BOOL waitingToSendLocalDescription;
 
 @end
 
@@ -37,13 +41,41 @@ @implementation CineRTCMember
 @synthesize sparkUUID;
 @synthesize peerConnection;
 @synthesize peerObserver;
+@synthesize support;
+@synthesize signalingConnection;
 
 - (void)markIceComplete
 {
     self.iceGatheringComplete = true;
     if (self.remoteAnswer){
+        NSLog(@"markIceComplete remoteAnswer");
         [self setAnswerOnPeerConnection];
     }
+    if (self.waitingToSendLocalDescription) {
+        NSLog(@"markIceComplete waitingToSendLocalDescription");
+        [self sendLocalDescription];
+    }
+}
+
+- (void)localDescriptionReady
+{
+    if ([self supportsTrickleIce]) {
+        NSLog(@"localDescriptionReady supports trickleIce");
+        [self sendLocalDescription];
+    } else if (self.iceGatheringComplete) {
+        NSLog(@"localDescriptionReady sending because iceGatheringComplete");
+        [self sendLocalDescription];
+    } else {
+        self.waitingToSendLocalDescription = true;
+        NSLog(@"localDescriptionReady waiting for iceGatheringComplete");
+    }
+
+}
+
+- (void)sendLocalDescription
+{
+    RTCSessionDescription* localDescription = [self.peerConnection localDescription];
+    [self.signalingConnection sendLocalDescription:self.sparkId description:localDescription];
 }
 
 - (void)setRemoteAnswerAndSetIfIceIsComplete:(NSString *)remoteAnswer
@@ -81,6 +113,11 @@ - (void)setAnswerOnPeerConnection
 
 }
 
+- (BOOL)supportsTrickleIce
+{
+    return self.support[@"trickleIce"] != NO;
+}
+
 - (NSString *)getSparkId
 {
     return self.sparkId;
diff --git a/cineio-peer-ios/cineio-peer-ios/CineSignalingConnection.m b/cineio-peer-ios/cineio-peer-ios/CineSignalingConnection.m
index c51a168..727206d 100644
--- a/cineio-peer-ios/cineio-peer-ios/CineSignalingConnection.m
+++ b/cineio-peer-ios/cineio-peer-ios/CineSignalingConnection.m
@@ -229,17 +229,17 @@ - (void)rejectCall:(NSString *)roomName
 // Signaling callbacks
 - (void)handleIce:(NSDictionary *)message
 {
-    [self.peerConnectionManager handleIce:message[@"sparkUUID"] otherClientSparkId:message[@"sparkId"] iceCandidate:message[@"offer"]];
+    [self.peerConnectionManager handleIce:message[@"sparkUUID"] otherClientSparkId:message[@"sparkId"] iceCandidate:message[@"offer"] support:message[@"support"]];
 }
 
 - (void)handleOffer:(NSDictionary *)message
 {
-    [self.peerConnectionManager handleOffer:message[@"sparkUUID"] otherClientSparkId:message[@"sparkId"] offer:message[@"offer"]];
+    [self.peerConnectionManager handleOffer:message[@"sparkUUID"] otherClientSparkId:message[@"sparkId"] offer:message[@"offer"] support:message[@"support"]];
 }
 
 - (void)handleAnswer:(NSDictionary *)message
 {
-    [self.peerConnectionManager handleAnswer:message[@"sparkUUID"] otherClientSparkId:message[@"sparkId"] answer:message[@"answer"]];
+    [self.peerConnectionManager handleAnswer:message[@"sparkUUID"] otherClientSparkId:message[@"sparkId"] answer:message[@"answer"] support:message[@"support"]];
 }
 
 - (void)handleError:(NSDictionary *)message
@@ -253,7 +253,7 @@ - (void)roomJoin:(NSDictionary *)message
 {
     NSString* otherClientSparkId = message[@"sparkId"];
     NSString* otherClientSparkUUID = message[@"sparkUUID"];
-    [self.peerConnectionManager ensurePeerConnection:otherClientSparkUUID otherClientSparkId:otherClientSparkId offer:true];
+    [self.peerConnectionManager ensurePeerConnection:otherClientSparkUUID otherClientSparkId:otherClientSparkId offer:true support:message[@"support"]];
     [self sendToOtherSpark:otherClientSparkId data:@{@"action": @"room-announce", @"room": message[@"room"]}];
 
 }
@@ -271,7 +271,7 @@ - (void)roomAnnounce:(NSDictionary *)message
 {
     NSString* otherClientSparkId = message[@"sparkId"];
     NSString* otherClientSparkUUID = message[@"sparkUUID"];
-    [self.peerConnectionManager ensurePeerConnection:otherClientSparkUUID otherClientSparkId:otherClientSparkId offer:false];
+    [self.peerConnectionManager ensurePeerConnection:otherClientSparkUUID otherClientSparkId:otherClientSparkId offer:false support:message[@"support"]];
 }
 
 - (void)roomGoodbye:(NSDictionary *)message