diff --git a/erpnext/crm/doctype/utils.py b/erpnext/crm/doctype/utils.py
index 9399fba..26cb298 100644
--- a/erpnext/crm/doctype/utils.py
+++ b/erpnext/crm/doctype/utils.py
@@ -1,4 +1,5 @@
 import frappe
+from frappe import _
 import json
 
 @frappe.whitelist()
@@ -53,7 +54,7 @@
 		if customer_name:
 			last_issue = frappe.get_all('Issue', {
 				'customer': customer_name
-			}, ['name', 'subject'], limit=1)
+			}, ['name', 'subject', 'customer'], limit=1)
 
 	elif reference_doc.doctype == 'Lead':
 		last_communication = frappe.get_all('Communication', {
@@ -70,9 +71,11 @@
 @frappe.whitelist()
 def add_call_summary(docname, summary):
 	communication = frappe.get_doc('Communication', docname)
-	communication.content = 'Call Summary by {user}: {summary}'.format({
-		'user': frappe.utils.get_fullname(frappe.session.user),
-		'summary': summary
-	})
+	content = _('Call Summary by {0}: {1}').format(
+		frappe.utils.get_fullname(frappe.session.user), summary)
+	if not communication.content:
+		communication.content = content
+	else:
+		communication.content += '\n' + content
 	communication.save(ignore_permissions=True)
 
diff --git a/erpnext/erpnext_integrations/exotel_integration.py b/erpnext/erpnext_integrations/exotel_integration.py
index 5b24e7c..c70b094 100644
--- a/erpnext/erpnext_integrations/exotel_integration.py
+++ b/erpnext/erpnext_integrations/exotel_integration.py
@@ -32,7 +32,14 @@
 
 @frappe.whitelist(allow_guest=True)
 def handle_end_call(*args, **kwargs):
-	call_log = get_call_log(kwargs)
+	close_call_log(kwargs)
+
+@frappe.whitelist(allow_guest=True)
+def handle_missed_call(*args, **kwargs):
+	close_call_log(kwargs)
+
+def close_call_log(call_payload):
+	call_log = get_call_log(call_payload)
 	if call_log:
 		call_log.status = 'Closed'
 		call_log.save(ignore_permissions=True)
@@ -82,6 +89,7 @@
 	response = requests.post('https://{api_key}:{api_token}@api.exotel.com/v1/Accounts/{sid}/Calls/connect.json?details=true'.format(
 		api_key=settings.api_key,
 		api_token=settings.api_token,
+		sid=settings.account_sid
 	), data={
 		'From': from_number,
 		'To': to_number,
@@ -91,4 +99,24 @@
 	return response.json()
 
 def get_exotel_settings():
-	return frappe.get_single('Exotel Settings')
\ No newline at end of file
+	return frappe.get_single('Exotel Settings')
+
+@frappe.whitelist(allow_guest=True)
+def get_phone_numbers():
+	numbers = 'some number'
+	whitelist_numbers(numbers, 'for number')
+	return numbers
+
+def whitelist_numbers(numbers, caller_id):
+	settings = get_exotel_settings()
+	query = 'https://{api_key}:{api_token}@api.exotel.com/v1/Accounts/{sid}/CustomerWhitelist'.format(
+		api_key=settings.api_key,
+		api_token=settings.api_token,
+		sid=settings.account_sid
+	)
+	response = requests.post(query, data={
+		'VirtualNumber': caller_id,
+		'Number': numbers,
+	})
+
+	return response
\ No newline at end of file
diff --git a/erpnext/public/js/call_popup/call_popup.js b/erpnext/public/js/call_popup/call_popup.js
index 2410684..5693ff0 100644
--- a/erpnext/public/js/call_popup/call_popup.js
+++ b/erpnext/public/js/call_popup/call_popup.js
@@ -43,9 +43,10 @@
 				'label': 'Submit',
 				'click': () => {
 					const values = this.dialog.get_values();
+					if (!values.call_summary) return
 					frappe.xcall('erpnext.crm.doctype.utils.add_call_summary', {
 						'docname': this.call_log.name,
-						'summary': `${__('Call Summary')}: ${values.call_summary}`,
+						'summary': values.call_summary,
 					}).then(() => {
 						this.dialog.set_value('call_summary', '');
 					});
@@ -62,6 +63,7 @@
 		this.dialog.$body.addClass('call-popup');
 		this.dialog.set_secondary_action(() => {
 			clearInterval(this.updater);
+			delete erpnext.call_popup;
 			this.dialog.hide();
 		});
 		this.dialog.show();
@@ -173,7 +175,7 @@
 				const issue_field = this.dialog.fields_dict["last_issue"];
 				issue_field.set_value(issue.subject);
 				issue_field.$wrapper
-					.append(`<a class="text-medium" href="#Form/Issue/${issue.name}">View ${issue.name}</a>`);
+					.append(`<a class="text-medium" href="#List/Issue/List?customer=${issue.customer}">View all issues from ${issue.customer}</a>`);
 			}
 		});
 	}