connector-telephony/crm_phone/crm_view.xml

<?xml version="1.0" encoding="utf-8"?>
<!--
  © 2014-2016 Akretion (Alexis de Lattre <alexis.delattre@akretion.com>)
  License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
-->

<odoo>
<data>


<record id="crm_case_form_view_leads" model="ir.ui.view">
    <field name="name">crm_phone.crm_lead.form</field>
    <field name="model">crm.lead</field>
    <field name="inherit_id" ref="crm.crm_case_form_view_leads"/>
    <field name="arch" type="xml">
        <field name="mobile" position="attributes">
            <attribute name="widget">phone</attribute>
        </field>
        <field name="fax" position="attributes">
            <attribute name="widget">fax</attribute>
        </field>
    </field>
</record>

<record id="crm_case_tree_view_leads" model="ir.ui.view">
    <field name="name">crm_phone.crm_lead.tree</field>
    <field name="model">crm.lead</field>
    <field name="inherit_id" ref="crm.crm_case_tree_view_leads"/>
    <field name="arch" type="xml">
        <field name="phone" position="attributes">
            <attribute name="widget">phone</attribute>
        </field>
    </field>
</record>

<record id="crm_case_form_view_oppor" model="ir.ui.view">
    <field name="name">crm_phone.case.view_opportuniy.form</field>
    <field name="model">crm.lead</field>
    <field name="inherit_id" ref="crm.crm_case_form_view_oppor"/>
    <field name="arch" type="xml">
        <field name="mobile" position="attributes">
            <attribute name="widget">phone</attribute>
        </field>
        <field name="fax" position="attributes">
            <attribute name="widget">fax</attribute>
        </field>
    </field>
</record>


</data>
</odoo>