You will need
  • phone;
  • - SIM card.
If you are a long time trying to reach the man, but I heard only short beeps, signifying that the subscriber is busy, then you most likely got into his black list. That is, you will not be able to reach him with your room, while it will not exclude you from its list.
If you urgently need to contact him, try send him a message asking to call back, briefly describe the situation. In most cases, the SMS reach the subscriber, if he sees fit, we will call you back.
If you did not wait for him to call, try after some time again to call him yourself. You may already excluded from the blacklist and you will be able to contact the subscriber.
If the attempt to call is not successful, then try to use the phone, boyfriend/girlfriend, acquaintance or relative. In this case, most likely, the answer will not keep you waiting long.
Currently, almost every corner there are shops where you can buy a SIM card. If you really need in the near future to talk with the caller, then buy a spare card, insert it into the phone and make that important call.
In General, remember, if you were listed in the "black list" in the personal area networks (MTS, Beeline, Tele2, etc.), you will only of the above ways. In that case, if you were entered in the "black list" in your device's settings, you will be on your phone to disable the "show room".