To activate “Call Forwarding” on landlines

On the landline handset dial: *21*RECIEVINGNUMBER#
example: *21*7779331#

To cancel call forwarding on landlines
On the landline handset dial: #21*#

To activate “Call Waiting” service on mobile phones

Dial: *43#

To receive Mobile “Internet Settings” by sms

Send a blank SMS to 222