diff --git a/erpnext/public/js/telephony.js b/erpnext/public/js/telephony.js
index b66126c..9548d6c 100644
--- a/erpnext/public/js/telephony.js
+++ b/erpnext/public/js/telephony.js
@@ -1,11 +1,18 @@
 frappe.ui.form.ControlData = frappe.ui.form.ControlData.extend( {
 	make_input() {
-		if (!this.df.read_only) {
-			this._super();
-		}
+		this._super();
 		if (this.df.options == 'Phone') {
 			this.setup_phone();
 		}
+		if (this.frm && this.frm.fields_dict) {
+			Object.values(this.frm.fields_dict).forEach(function(field) {
+				if (field.df.read_only === 1 && field.df.options === 'Phone' 
+					&& field.disp_area.style[0] != 'display' && !field.has_icon) {
+					field.setup_phone();
+					field.has_icon = true;
+				}
+			});
+		}
 	},
 	setup_phone() {
 		if (frappe.phone_call.handler) {