This is where smart IMSI technology comes in. The "smart" part means that the SIM card holds more than one IMSI. It can have two, three, or even more. This type of SIM is often called a multi-IMSI SIM. When a device enters a new country, its SIM card looks for a local network. If it finds one, it can switch to a different IMSI. This new IMSI is from a local network operator. As a resu... b2breviews.club