Block All Calls and Get their Missed Call Alerts on Safaricom

We've already seen how to activate or deactivate missed call alerts in events when you were unreachable. This is the service that's responsible for sending that SMS alert that tells you of persons that tried calling you when you were unreachable. i.e. I tried to call you at [time] on [date]. Please call back.

Now you may also want to get the missed call alert SMS while you're still on the network. That is, you phone will be on and reachable but you callers will instead be notified that you're not available, thus blocking them. This should explain how it is someone can be unreachable (mteja) while still being able to make calls.

I take it people use this service on numbers that are primarily for making outgoing calls only, to block calls or in situations when someone wants to monitor people trying to call them. Whatever your reasons may be, here's how to go about enabling or disabling the service.



To Activate the Service

block calls
Block Calls
1. Go to your phone and dial the following activation code: **21*0722199199#

2. You should then get a response with the message Succeded.
activated
Service Activated


To Deactivate the Service

1. Go to your phone and dial the following code: ##21#

2. You should then get a response with the message Succeded.



How this Works

sms
Example of a Missed Call SMS Alert

This service is part of Safaricom's voicemail service and works through the call forwarding (divert) settings. The voicemail feature is therefore also activated and your callers, while they may not reach you will still get the option to leave you a voice message should they wish to.

When somebody calls a number that has this service activated they will be forwarded to the number 0722199199 that is inside the activation code. However, unlike the normal missed call alert divert that works on the condition that you're actually unreachable here all calls are diverted to that number irrespective of your availability.
forward all calls
Forward All Calls

You can therefore alternatively set this up as a call divert/forwarding in your phone. Just go to the Call Settings for your network operator and set all calls to forward to 0722199199. On Android phones this option may be named as Always forward.


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