HLR lookup is a service, which allows you to find out if the number is active and if it is in roaming; that will help you save money on calls on inactive numbers.
You need database actualization if:
- You are not sure if the number is active;
- You would like to lower expenses on call-center operators’ salaries;
- You need to know if the contact is in roaming;
- You need to determine contact’s carrier (nowadays a lot of clients switch providers while keeping the same number);
- You would like to save up on SMS-notifications sent to inactive numbers.