diff --git a/pcscf/kamailio_pcscf.cfg b/pcscf/kamailio_pcscf.cfg
index 4521976..a94f6ee 100644
--- a/pcscf/kamailio_pcscf.cfg
+++ b/pcscf/kamailio_pcscf.cfg
@@ -282,7 +282,6 @@ modparam("htable", "htable", "natpingfrom=>size=8;autoexpire=600000;")
 
 modparam("htable", "htable", "contact=>size=8;autoexpire=20")
 modparam("htable", "htable", "a=>size=8;autoexpire=20")
-modparam("htable", "htable", "supported=>size=8;autoexpire=20")
 
 #!ifdef WITH_IMS_HDR_CACHE
 modparam("htable", "htable", "serviceroutes=>size=16;autoexpire=14400;")
@@ -470,7 +469,7 @@ modparam("statistics", "variable", "register_time")
 # - processing of any incoming SIP request starts with this route
 route {
 ##!ifdef WITH_DEBUG
-	xlog("$rm ($fu ($si:$sp) to $tu, $ci)\n");
+	xnotice("PCSCF: $rm $ru ($fu ($si:$sp) to $tu, $ci)\n");
 ##!endif
 
 #!ifdef WITH_WEBSOCKET
@@ -496,11 +495,6 @@ route {
 		exit;
 	}
 
-	# handle requests within SIP dialogs
-	route(WITHINDLG);
-
-	### only initial requests (no To tag)
-
 	# handle retransmissions
 	if(t_precheck_trans()) {
 		t_check_trans();
@@ -511,6 +505,11 @@ route {
 	# Check for Re-Transmissions
 	t_check_trans();
 
+	# handle requests within SIP dialogs
+	route(WITHINDLG);
+
+	### only initial requests (no To tag)
+
 	if (is_method("UPDATE")) {
 		send_reply("403","Forbidden - Target refresh outside dialog not allowed");
 		break;
@@ -778,44 +777,23 @@ route[RELAY] {
 # Handle requests within SIP dialogs
 route[WITHINDLG] {
 	if (has_totag()) {
-		xnotice("Within DLG");
+		xnotice("Within DLG\n");
 		# sequential request withing a dialog should
 		# take the path determined by record-routing
 		if (loose_route()) {
-			xnotice("Within loose route");
+			xnotice("Within loose route\n");
 			if(!isdsturiset()) {
 				handle_ruri_alias();
 				#if ($rc == 1) {
 				#	$ru = "sip:" + $rU + "@" + $dd + ":" + $dp + ";transport=" + $rP;
 				#}
 			}
+
 			if ( is_method("ACK") && ($sht(contact=>$ci) != $null) ) {
 				xlog("Contact of Reply: $sht(contact=>$ci) ($ci)\n");
 				$ru = $sht(contact=>$ci);
 			}
 
-			# https://www.sharetechnote.com/html/IMS_SIP_Precondition.html
-			# https://www.sharetechnote.com/html/IMS_SIP_Precondition.html#Requirement_for_UPDATE
-			if (is_method("PRACK") && (($sht(supported=>$ci) =~ ".*precondition.*") || ($sht(supported=>$ci) =~ ".*precondition.*"))) {
-				if(!is_present_hf("Supported")) {
-					append_hf("Supported: 100rel,precondition\r\n");
-				} else {
-					remove_hf("Supported");
-					$var(new_supp) = $hdr(Supported);
-					if (!($hdr(Supported) =~ ".*precondition.*")) {
-						$var(new_supp) = $var(new_supp) + ",precondition";
-					}
-					if (!($hdr(Supported) =~ ".*100rel.*")) {
-						$var(new_supp) = $var(new_supp) + ",100rel";
-					}
-					append_hf("Supported: $var(new_supp)\r\n");
-				}
-				xnotice("Invite Supported: $sht(supported=>$ci)\n");
-				xnotice("Old Supported: $hdr(Supported)\n");
-				xnotice("New Supported: $var(new_supp)\n");
-				msg_apply_changes();
-			}
-
 			if ($route_uri =~ "sip:mt@.*") {
 				route(MT_indialog);
 			} else {
diff --git a/pcscf/route/mo.cfg b/pcscf/route/mo.cfg
index f1cc01f..5fc6d10 100644
--- a/pcscf/route/mo.cfg
+++ b/pcscf/route/mo.cfg
@@ -87,11 +87,6 @@ route[MO]
 	}
 	set_dlg_profile("orig");
 	t_on_reply("MO_reply");
-
-	# Store the supported header if INVITE
-	if (is_method("INVITE")) {
-		$sht(supported=>$ci) = $hdr(Supported);
-	}
 }
 
 ######################################################################
@@ -112,12 +107,6 @@ onreply_route[MO_reply] {
 		ipsec_forward("location");
 	#}
 #!endif
-	# If reply 183/200 does not have Require: precondition then empty stored supported hash entry
-	if (t_check_status("183|200") && has_body("application/sdp")) {
-		if (is_present_hf("Require") && !($hdr(Require) =~ ".*precondition.*")) {
-			$sht(supported=>$ci) = $null;
-		}
-	}
 	# In case of 1xx and 2xx do NAT
 	if(status=~"[12][0-9][0-9]")
 		route(NATMANAGE);