You can always see the number of the person calling you on the display of your Zain mobile phone.
When you see who is calling, you can decide whether to answer or not. If you don't want to take the call, it is automatically transferred to your voicemail. That way, you can reply when it suits you.
The service is free and is already set up on all Zain mobile phones.
You can prevent your number from showing on someone else's mobile phone when you call them. This service is on request just call our customer care for details.