This will give them a message that you will not accept the call. To set up such a service go to settings on Android phones and select the phone option, use block number and turn on block unknown colleges. This will allow you to find out the name, phone number, and blacklist the number. Unknown numbers can be identified using a system called Trap Call. You will also need to change your name and address. Understand that they asked for the exact date and time when they called you.

This article explains five different ways to track down and call back private numbers. Use TrapCall to unblock private numbers, or dial 57 or 57 to trace calls. Check your phone provider logs, or use Reverse Lookup. Therefore, in case of any unwanted calls, contact the company immediately and inform them of this information. Dial 69 from a landline or cellphone before anyone else calls you or use special website. The first thing you can do to find out whose call is coming to your number is to contact your phone company, as all incoming calls will be recorded there. This will automatically block the caller ID of your number. If you receive a call from a number with a feature called NO caller ID, you will see it as an unknown caller.

Telephone number announcements will not be made and numbers cannot be called back for calls made through some telecom-munications carriers (including mobile phone carriers and IP phone carriers), from numbers that cannot be given out such as numbers for international calls (exceptions apply), and calls from public phones or numbers programmed not to display caller ID.Before that, if a phone number coming to your phone is spam, let’s see how they hide it.

You can use this service with your current phone.

If you wish to call one of the numbers, follow the prompts and enter 3 for automatic redial (when the caller chooses to have their number given out).

When caller information is not given, the reason will be announced.

If you lift the receiver, dial 136 and follow the voice prompts, you will hear the last five callers' numbers and the date and time of the calls.

This announcement service will inform you of the details of the last five calls you have received: phone number of the caller and the date/time of the call.

How to find out no caller id