def METHOD_NAME(contact, method):
	if contact.phone_nos:
		contact_lead = contact.get_link_for("Lead")
		if contact_lead:
			phone = mobile_no = contact.phone_nos[0].phone
			if len(contact.phone_nos) > 1:
				# get the default phone number
				primary_phones = [
					phone_doc.phone for phone_doc in contact.phone_nos if phone_doc.is_primary_phone
				]
				if primary_phones:
					phone = primary_phones[0]
				# get the default mobile number
				primary_mobile_nos = [
					phone_doc.phone for phone_doc in contact.phone_nos if phone_doc.is_primary_mobile_no
				]
				if primary_mobile_nos:
					mobile_no = primary_mobile_nos[0]
			lead = frappe.get_doc("Lead", contact_lead)
			lead.db_set("phone", phone)
			lead.db_set("mobile_no", mobile_no)