diff --git a/libgm/gmproto/authentication.pb.go b/libgm/gmproto/authentication.pb.go
index 50a688a..a5b8454 100644
--- a/libgm/gmproto/authentication.pb.go
+++ b/libgm/gmproto/authentication.pb.go
@@ -1,6 +1,6 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
-// 	protoc-gen-go v1.31.0
+// 	protoc-gen-go v1.34.1
 // 	protoc        v3.21.12
 // source: authentication.proto
 
diff --git a/libgm/gmproto/client.pb.go b/libgm/gmproto/client.pb.go
index 7849c05..b2bd6f4 100644
--- a/libgm/gmproto/client.pb.go
+++ b/libgm/gmproto/client.pb.go
@@ -1,6 +1,6 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
-// 	protoc-gen-go v1.31.0
+// 	protoc-gen-go v1.34.1
 // 	protoc        v3.21.12
 // source: client.proto
 
@@ -2647,7 +2647,8 @@ type SendMessageResponse struct {
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
 
-	Status SendMessageResponse_Status `protobuf:"varint,3,opt,name=status,proto3,enum=client.SendMessageResponse_Status" json:"status,omitempty"`
+	GoogleAccountSwitch *AccountChangeOrSomethingEvent `protobuf:"bytes,2,opt,name=googleAccountSwitch,proto3" json:"googleAccountSwitch,omitempty"`
+	Status              SendMessageResponse_Status     `protobuf:"varint,3,opt,name=status,proto3,enum=client.SendMessageResponse_Status" json:"status,omitempty"`
 }
 
 func (x *SendMessageResponse) Reset() {
@@ -2682,6 +2683,13 @@ func (*SendMessageResponse) Descriptor() ([]byte, []int) {
 	return file_client_proto_rawDescGZIP(), []int{41}
 }
 
+func (x *SendMessageResponse) GetGoogleAccountSwitch() *AccountChangeOrSomethingEvent {
+	if x != nil {
+		return x.GoogleAccountSwitch
+	}
+	return nil
+}
+
 func (x *SendMessageResponse) GetStatus() SendMessageResponse_Status {
 	if x != nil {
 		return x.Status
@@ -3289,7 +3297,8 @@ var file_client_proto_goTypes = []interface{}{
 	(*SIMPayload)(nil),                                 // 67: settings.SIMPayload
 	(*MessageInfo)(nil),                                // 68: conversations.MessageInfo
 	(*MessageContent)(nil),                             // 69: conversations.MessageContent
-	(*ReactionData)(nil),                               // 70: conversations.ReactionData
+	(*AccountChangeOrSomethingEvent)(nil),              // 70: events.AccountChangeOrSomethingEvent
+	(*ReactionData)(nil),                               // 71: conversations.ReactionData
 }
 var file_client_proto_depIdxs = []int32{
 	58, // 0: client.ReceiveMessagesRequest.auth:type_name -> authentication.AuthMessage
@@ -3329,19 +3338,20 @@ var file_client_proto_depIdxs = []int32{
 	46, // 34: client.MessagePayload.messagePayloadContent:type_name -> client.MessagePayloadContent
 	68, // 35: client.MessagePayload.messageInfo:type_name -> conversations.MessageInfo
 	69, // 36: client.MessagePayloadContent.messageContent:type_name -> conversations.MessageContent
-	4,  // 37: client.SendMessageResponse.status:type_name -> client.SendMessageResponse.Status
-	70, // 38: client.SendReactionRequest.reactionData:type_name -> conversations.ReactionData
-	5,  // 39: client.SendReactionRequest.action:type_name -> client.SendReactionRequest.Action
-	67, // 40: client.SendReactionRequest.SIMPayload:type_name -> settings.SIMPayload
-	57, // 41: client.TypingUpdateRequest.data:type_name -> client.TypingUpdateRequest.Data
-	52, // 42: client.ReceiveMessagesRequest.UnknownEmptyObject2.unknown:type_name -> client.ReceiveMessagesRequest.UnknownEmptyObject1
-	60, // 43: client.AckMessageRequest.Message.device:type_name -> authentication.Device
-	18, // 44: client.GetThumbnailResponse.Thumbnail.data:type_name -> client.ThumbnailData
-	45, // [45:45] is the sub-list for method output_type
-	45, // [45:45] is the sub-list for method input_type
-	45, // [45:45] is the sub-list for extension type_name
-	45, // [45:45] is the sub-list for extension extendee
-	0,  // [0:45] is the sub-list for field type_name
+	70, // 37: client.SendMessageResponse.googleAccountSwitch:type_name -> events.AccountChangeOrSomethingEvent
+	4,  // 38: client.SendMessageResponse.status:type_name -> client.SendMessageResponse.Status
+	71, // 39: client.SendReactionRequest.reactionData:type_name -> conversations.ReactionData
+	5,  // 40: client.SendReactionRequest.action:type_name -> client.SendReactionRequest.Action
+	67, // 41: client.SendReactionRequest.SIMPayload:type_name -> settings.SIMPayload
+	57, // 42: client.TypingUpdateRequest.data:type_name -> client.TypingUpdateRequest.Data
+	52, // 43: client.ReceiveMessagesRequest.UnknownEmptyObject2.unknown:type_name -> client.ReceiveMessagesRequest.UnknownEmptyObject1
+	60, // 44: client.AckMessageRequest.Message.device:type_name -> authentication.Device
+	18, // 45: client.GetThumbnailResponse.Thumbnail.data:type_name -> client.ThumbnailData
+	46, // [46:46] is the sub-list for method output_type
+	46, // [46:46] is the sub-list for method input_type
+	46, // [46:46] is the sub-list for extension type_name
+	46, // [46:46] is the sub-list for extension extendee
+	0,  // [0:46] is the sub-list for field type_name
 }
 
 func init() { file_client_proto_init() }
@@ -3353,6 +3363,7 @@ func file_client_proto_init() {
 	file_authentication_proto_init()
 	file_settings_proto_init()
 	file_util_proto_init()
+	file_events_proto_init()
 	if !protoimpl.UnsafeEnabled {
 		file_client_proto_msgTypes[0].Exporter = func(v interface{}, i int) interface{} {
 			switch v := v.(*NotifyDittoActivityRequest); i {
diff --git a/libgm/gmproto/client.pb.raw b/libgm/gmproto/client.pb.raw
index eb5e3a5..01ccd24 100644
Binary files a/libgm/gmproto/client.pb.raw and b/libgm/gmproto/client.pb.raw differ
diff --git a/libgm/gmproto/client.proto b/libgm/gmproto/client.proto
index e12da56..86aba38 100644
--- a/libgm/gmproto/client.proto
+++ b/libgm/gmproto/client.proto
@@ -7,6 +7,7 @@ import "conversations.proto";
 import "authentication.proto";
 import "settings.proto";
 import "util.proto";
+import "events.proto";
 
 message NotifyDittoActivityRequest {
     // This is not actually a boolean: after logging out, field 2 has value 2, and field 3 has value 1.
@@ -283,6 +284,7 @@ message SendMessageResponse {
         FAILURE_3 = 3;
         FAILURE_4 = 4; // not default sms app?
     }
+    events.AccountChangeOrSomethingEvent googleAccountSwitch = 2;
     Status status = 3;
 }
 
diff --git a/libgm/gmproto/config.pb.go b/libgm/gmproto/config.pb.go
index ad1af37..9b95b71 100644
--- a/libgm/gmproto/config.pb.go
+++ b/libgm/gmproto/config.pb.go
@@ -1,6 +1,6 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
-// 	protoc-gen-go v1.31.0
+// 	protoc-gen-go v1.34.1
 // 	protoc        v3.21.12
 // source: config.proto
 
diff --git a/libgm/gmproto/conversations.pb.go b/libgm/gmproto/conversations.pb.go
index 6bc266e..1a9f8a1 100644
--- a/libgm/gmproto/conversations.pb.go
+++ b/libgm/gmproto/conversations.pb.go
@@ -1,6 +1,6 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
-// 	protoc-gen-go v1.31.0
+// 	protoc-gen-go v1.34.1
 // 	protoc        v3.21.12
 // source: conversations.proto
 
diff --git a/libgm/gmproto/events.pb.go b/libgm/gmproto/events.pb.go
index 375db26..c5cd701 100644
--- a/libgm/gmproto/events.pb.go
+++ b/libgm/gmproto/events.pb.go
@@ -1,6 +1,6 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
-// 	protoc-gen-go v1.31.0
+// 	protoc-gen-go v1.34.1
 // 	protoc        v3.21.12
 // source: events.proto
 
diff --git a/libgm/gmproto/pblite.pb.go b/libgm/gmproto/pblite.pb.go
index 7d49b56..4e29c16 100644
--- a/libgm/gmproto/pblite.pb.go
+++ b/libgm/gmproto/pblite.pb.go
@@ -1,6 +1,6 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
-// 	protoc-gen-go v1.31.0
+// 	protoc-gen-go v1.34.1
 // 	protoc        v3.21.12
 // source: pblite.proto
 
diff --git a/libgm/gmproto/rpc.pb.go b/libgm/gmproto/rpc.pb.go
index af17c3e..cf1ca07 100644
--- a/libgm/gmproto/rpc.pb.go
+++ b/libgm/gmproto/rpc.pb.go
@@ -1,6 +1,6 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
-// 	protoc-gen-go v1.31.0
+// 	protoc-gen-go v1.34.1
 // 	protoc        v3.21.12
 // source: rpc.proto
 
@@ -123,6 +123,7 @@ const (
 	ActionType_CREATE_GAIA_PAIRING_CLIENT_FINISHED    ActionType = 45
 	ActionType_UNPAIR_GAIA_PAIRING                    ActionType = 46
 	ActionType_CANCEL_GAIA_PAIRING                    ActionType = 47
+	ActionType_PREWARM                                ActionType = 48
 )
 
 // Enum value maps for ActionType.
@@ -174,6 +175,7 @@ var (
 		45: "CREATE_GAIA_PAIRING_CLIENT_FINISHED",
 		46: "UNPAIR_GAIA_PAIRING",
 		47: "CANCEL_GAIA_PAIRING",
+		48: "PREWARM",
 	}
 	ActionType_value = map[string]int32{
 		"UNSPECIFIED":                            0,
@@ -222,6 +224,7 @@ var (
 		"CREATE_GAIA_PAIRING_CLIENT_FINISHED":    45,
 		"UNPAIR_GAIA_PAIRING":                    46,
 		"CANCEL_GAIA_PAIRING":                    47,
+		"PREWARM":                                48,
 	}
 )
 
diff --git a/libgm/gmproto/rpc.pb.raw b/libgm/gmproto/rpc.pb.raw
index 2a1ef3a..ff7ea85 100644
Binary files a/libgm/gmproto/rpc.pb.raw and b/libgm/gmproto/rpc.pb.raw differ
diff --git a/libgm/gmproto/rpc.proto b/libgm/gmproto/rpc.proto
index 6abec8f..600845b 100644
--- a/libgm/gmproto/rpc.proto
+++ b/libgm/gmproto/rpc.proto
@@ -161,6 +161,7 @@ enum ActionType {
     CREATE_GAIA_PAIRING_CLIENT_FINISHED = 45;
     UNPAIR_GAIA_PAIRING = 46;
     CANCEL_GAIA_PAIRING = 47;
+    PREWARM = 48;
 }
 
 enum MessageType {
diff --git a/libgm/gmproto/settings.pb.go b/libgm/gmproto/settings.pb.go
index 7a210d6..2e40c37 100644
--- a/libgm/gmproto/settings.pb.go
+++ b/libgm/gmproto/settings.pb.go
@@ -1,6 +1,6 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
-// 	protoc-gen-go v1.31.0
+// 	protoc-gen-go v1.34.1
 // 	protoc        v3.21.12
 // source: settings.proto
 
diff --git a/libgm/gmproto/ukey.pb.go b/libgm/gmproto/ukey.pb.go
index 5f07c62..eb463b1 100644
--- a/libgm/gmproto/ukey.pb.go
+++ b/libgm/gmproto/ukey.pb.go
@@ -1,6 +1,6 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
-// 	protoc-gen-go v1.31.0
+// 	protoc-gen-go v1.34.1
 // 	protoc        v3.21.12
 // source: ukey.proto
 
diff --git a/libgm/gmproto/util.pb.go b/libgm/gmproto/util.pb.go
index d0b1c81..52c2de4 100644
--- a/libgm/gmproto/util.pb.go
+++ b/libgm/gmproto/util.pb.go
@@ -1,6 +1,6 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
-// 	protoc-gen-go v1.31.0
+// 	protoc-gen-go v1.34.1
 // 	protoc        v3.21.12
 // source: util.proto
 
diff --git a/messagetracking.go b/messagetracking.go
index 44fb219..065ee78 100644
--- a/messagetracking.go
+++ b/messagetracking.go
@@ -86,6 +86,7 @@ func (ose OutgoingStatusError) Is(other error) bool {
 
 func errorToStatusReason(err error) (reason event.MessageStatusReason, status event.MessageStatus, isCertain, sendNotice bool, humanMessage string) {
 	var ose OutgoingStatusError
+	var rse *responseStatusError
 	switch {
 	case errors.Is(err, errUnexpectedParsedContentType),
 		errors.Is(err, errUnknownMsgType):
@@ -104,6 +105,8 @@ func errorToStatusReason(err error) (reason event.MessageStatusReason, status ev
 		return event.MessageStatusTooOld, event.MessageStatusRetriable, false, true, "sending the message is taking long; is your phone online?"
 	case errors.Is(err, errTargetNotFound):
 		return event.MessageStatusGenericError, event.MessageStatusFail, true, false, ""
+	case errors.As(err, &rse):
+		return event.MessageStatusNetworkError, event.MessageStatusRetriable, true, true, rse.Error()
 	case errors.As(err, &ose):
 		return event.MessageStatusNetworkError, event.MessageStatusFail, true, true, ose.HumanError()
 	default:
diff --git a/portal.go b/portal.go
index 0dc0258..4873c5d 100644
--- a/portal.go
+++ b/portal.go
@@ -2049,6 +2049,24 @@ func (portal *Portal) reuploadMedia(ctx context.Context, sender *User, content *
 	return resp, nil
 }
 
+type responseStatusError gmproto.SendMessageResponse
+
+func (rse *responseStatusError) Error() string {
+	switch rse.Status {
+	case 0:
+		if rse.GoogleAccountSwitch != nil && strings.ContainsRune(rse.GoogleAccountSwitch.GetAccount(), '@') {
+			return "Switch back to QR pairing or log in with Google account to send messages"
+		}
+	case gmproto.SendMessageResponse_FAILURE_2:
+		return "Unknown permanent error"
+	case gmproto.SendMessageResponse_FAILURE_3:
+		return "Unknown temporary error"
+	case gmproto.SendMessageResponse_FAILURE_4:
+		return "Google Messages is not your default SMS app"
+	}
+	return fmt.Sprintf("Unrecognized response status %d", rse.Status)
+}
+
 func (portal *Portal) HandleMatrixMessage(sender *User, evt *event.Event, timings messageTimings) {
 	ms := metricSender{portal: portal, timings: &timings}
 
@@ -2093,7 +2111,7 @@ func (portal *Portal) HandleMatrixMessage(sender *User, evt *event.Event, timing
 	} else if resp.Status != gmproto.SendMessageResponse_SUCCESS {
 		outgoingMsg.Errored = true
 		outgoingMsg.Acked = true
-		go ms.sendMessageMetrics(ctx, sender, evt, fmt.Errorf("response status %d", resp.Status), "Error sending", true)
+		go ms.sendMessageMetrics(ctx, sender, evt, (*responseStatusError)(resp), "Error sending", true)
 	} else {
 		outgoingMsg.Acked = true
 		go ms.sendMessageMetrics(ctx, sender, evt, nil, "", true)