YES, iSMS fully support Mobile Number Portability, there is no extra cost to send sms to MNP number. IMSI - International Mobile Subscriber Identity is a unique number burned in SIM card. IMSI is used for authentication, to identify a subscriber to the operator.
MSISDN - The actual phone number used for dialing. It is not stored in the SIM card but at the mobile network operator side. This concept allows changing the phone number without changing the SIM card (which contains only IMSI). |