Find phone by IMEI
Search by satellite for free, but it will require a connection to the mobile company that provides you with the operator's services, or to establish this special program. In the case of the program, the phone must be mounted GPS receiver, which will transmit the detailed information on the location of the phone. The disadvantage of this program is that it must include yourself, therefore wise to purchase a mobile phone has sewn" program. The presence of this function will be able to learn from a consultant-seller when selecting phone model. I can say with confidence that this function accurately "find in mobile phones such as the iPhone.
The program works as follows: you install the software in the phone, register on the official website and enter the data of your mobile phone (if you want). After which the program runs all the time while including mobile phone and transmits data from the GPS to the site. That is, at any time, you can visit the site and see what is now your mobile phone. Advantages of this method lies in the fact that it works regardless of the inserted SIM card, the disadvantages - you need free access to the Internet, and of a modern phone.
Monitor the phone the other way is impossible! Therefore, do not try to send SMSes to dim rooms that promise to give you any information about the whereabouts of the phone.