Land Phone Bangladesh; Lock and Unlock

To lock all outgoing call:  *34*password*01#
To lock NWD & ISD call: *34*password*02#
To lock NWD call: *34*password*03#
To lock ISD call: *34*password*04#
To lock local call: *34*password*05#
To unlock all: #34*password#
password= any four digit like 1234, 7819 etc,

(It's important to remember the password because if you forget it,

you have to apply to Divisional Engineer with copy of demand note to reset it.)

Enquiry: 17     Complaint: 18    Time: 14