How to control your call

Do you know that we can limit our SIM outgoing call only to certain numbers? yup it's true. Sometime we need to limit access for outgoing call made from SIM. Let me give you one example, let's say we give our children a mobile phone and SIM and we want to control to which numbers only they can make call. We can do this with Fixed Dialing Number (FDN).

With FDN we can control the destination number of outgoing call and as result we can control the bill as well :)

Inside the SIM there is a file named EF FDN (6F3B) wich contain records to store phone numbers. The number of records and capacity are following the SIM Phonebook records. Outgoing call can only be made to the listed numbers in these records.

To activate FDN you need to put PIN2 then you can start to store phone numbers. you can ask your operators for your PIN2.

Here are the steps to activate FDN. I am using Nokia 2626 menu as example :
- menu - setting - security - fixed dialing number - on
- put your PIN2
- then you can put phone numbers in the list

Use your PIN !

Use your PIN!

One of the basic security feature provided by your SIM is PIN Protection. It is simple but unluckily most of SIM users are not using it. Let me tell you something. What happen if someday you lost your SIM and it is found by somebody else and using it.

It is Okay if it is a prepaid SIM then you don't have to be worry because it has limited credit. But if it is a post paid then it will be disaster :) you have to pay for what you didn't use.

That's why it is better to activate the PIN inside your SIM. There are 2 PINs inside your SIM : PIN1 and PIN2. Most operators will have a common number for PIN1 like "1111" or "1234". Also usually many operators will not activate the PIN in new SIM untill the user activate it. After the PIN was activated then you can change it by yourself.

Here are several steps to activate PIN in your SIM. I am using Nokia 2626 menu as example.

- Activate your PIN code request

Menu - Setting - Security setting - PIN code request

Then you will asked to put your PIN.

Select "On".

And after that, when everytime you start your SIM it will ask you to put the PIN number. After you successfully activate your PIN, better to change it.

Here are the steps :

- Setting - Security setting - Access code - Change PIN code.
- Put your current PIN.
- Put your new PIN.
- Confirm your new PIN.
- Done