All Sim Call Forward System

GP Call Forward
===================
 Forward Service                                                    To Activate                 
Call Forward when Not Reachable          * 62 * phone number #
Call Forward when the phone is Busy  * 67 * phone number #
Call Forward when there is No Reply * 61 * phone number #
Call Forward All Calls                              * 21 * phone number #
   
To Cancel All sorts of call forwarding # # 002 #  


Call forward Jio
============
1. Call forwarding Unconditional -                                       *401*<10 digit number>
2. Call forwarding - no answer-                                             *403*<10 digit number>
3. Call forwarding - busy -                                                     *405*<10 digit number>
4. Call Conditional call forwarding - not reachable-           *409*<10 digit number>

Also, 
To deactivate call forwarding, go to Settings > Call > Advance settings > Call forwarding. Please note the navigation might differ on different handsets. Alternatively it can be deactivated by dialling the respective short codes: 

1. Call forwarding Unconditional - *402
2. Call forwarding - no answer- *404
3. Call forwarding - busy - *406
4. Call Conditional call forwarding - not reachable-*410
5. All forwarding - *413

Call forward Banglalink
===========================
Divert Type: All divert
Activation: **21*Divert Number#
Check: ##21#
Deactivation: *#21#

Divert Type: When busy
Activation: **67*Divert Number#
Check: ##67#
Deactivation: *#67#

Divert Type: No reply
Activation: **61*Divert Number#
Check: ##61#
Deactivation: *#61#

Divert Type: Unreachable
Activation: **62*Divert Number#
Check: ##62#
Deactivation: *#62#


Call forward Robi
==============
Select one or more divert options and press the following keys to activate or cancel divert from your handset:

Divert Options                            Activate                                                                                      
UNREACHABLE          * * 62 * DIVERT NUMBER # 
BUSY                         * * 67 * DIVERT NUMBER # 
NO REPLY                    * * 61 * DIVERT NUMBER # 
ALL CALLS                 * * 21 * DIVERT NUMBER # 

You can cancel ALL DIVERT by pressing # # 002 # SEND