The system works this way:
- there is a blacklist of TAC (initial part of IMEI that identify manufacturer, model and sub model:
http://en.wikipedia.org/wiki/T... [wikipedia.org])
- actually info for this blacklist is furnished by manufacturers, that will probably include all their models regardless of being or not sold in Brazil, but this can be later changed by Anatel, restricting the list
- there will be a whitelist of "blacklisted IMEIs" activated in the network before March 17th, 2014
- there will be a blacklist of permitted IMEI (e.g. an iPhone sold in Brazil) that were used (i.e. cloned) in "IMEI configurable" Chinese smartphones/tablet
- there will be a whitelist of IMEI+IMSI to identify the original cloned (I don't know who will identify the original one if many claims to be the original one)
- block will be set in the network on each individual IMEI
- permission will be set in the network for specific IMEI+IMSI
- the system is tailored to control individual IMEIs and not only generic TAC
Do you see the potential of chaos? Chinese smartphone seller will setup "change your IMEI daily" services and it will be cat and mouse play until a complete mess... and mobile operator will hardly divert resource to help in solving it or handle complaints...