BACK MODIFY YOUR PHONE NO., FAX NO. OR MOBILE NO. Enter your username Enter your password     Enter old No. Enter new No.             Select No. type Landline No. Mobile No. Fax No. Select No. type Enter Old & New Landline Phone No., Mobile No. or Fax No., as may be required and select No. type. STD Code is not to be entered before Landline phone & Fax. Also 0 is not to be entered before Mobile No.