In our modern world, everyone uses mobile devices, which in turn help us connect with other people using a SIM card. It is not uncommon for a situation to arise in which it may turn out that your SIM card is blocked.
There are several options for blocking SIM cards:
- If your subscriber number balance is negative, there are overdue debts for communications, or you have violated the terms of the user agreement, then the mobile operator has the right to forcibly block your SIM card.
- Situations often arise in which a SIM card may be lost, damaged, or even stolen. In such cases, you can independently contact the mobile operator company and voluntarily block it. In any case, you will be able to restore it using your passport data.
How to find out if an MTS phone number is available
It happens that you need to find out whether a subscriber is currently online, but without disturbing him in any way.
Is it possible to find out this information without him knowing about it at all? Can. Moreover, you don’t need to call, send SMS, or even contact the subscriber in any way. To obtain up-to-date information about the status of the SIM card, you can use the HLR request. An HLR request (abbreviation for Home Location Register) is a regular request to an unusual database. This database stores information specifically about whether the subscriber is online or not; whether his phone is on or off. At the same time, the user himself does not know that his phone is being checked: the request goes to the database of the serving cellular operator.
But enough theory, how to implement it in practice? There are many companies that provide a similar service. For a fee. However, you can do this for free.
On this site, simply enter your phone number, and in just a few seconds you will receive approximately the following information:
So, it’s very easy to find out whether a subscriber of any cellular operator is online: an hlr request will help. It's free and very simple. However, it’s worth clarifying one point right away: information on a phone number in the operator’s database retrieved using an HLR request is not updated instantly. There may also be some delays in receiving data if the phone with (or without) the subscriber is currently roaming.
notes, phones, HLR
Your problem can be solved in two ways:
1) If a subscriber goes to some site for which only he knows the password (VKontakte, Facebook) and it will be displayed there that he is online. 2) If you install an application on the subscriber’s phone or computer that will check once a minute (for example), whether the gadget is on the Internet. By the way, I can write such a program for both Windows and Android
