secam se kada je telenor uvodio 3G, i tada se pricalo o USIM karticama, i da 3G nece raditi bez njih. da li su posle toga davali korisnicima USIM karticu koja bi radila i sa 4G ne znam, ali trebalo bi da jesu.
jedan tekst u vezi toga:
SIM cards (Subscriber Identity Module) are used to communicate on GSM networks. With the introduction of UMTS or 3G, it's highly recommended to use a USIM card to access UMTS network. Although it's possible to access it with a simple SIM card, the USIM have many advantages as compared to the SIM:
• A USIM is a tiny computer which is able to handle several mini applications, for instance a contactless e-purse for the subway, a local service portal giving you access to your phone bill, etc;
• A 3G (UMTS) handset equipped with a USIM card can be used to make video calls, assuming the calling area is covered by a 3G network;
• Regarding security, a new algorithm is integrated (it's derived from recent researches in cryptology). It allows to protect you from unauthorized access to your phone line, and therefore to be charged with fraudulent calls on your bill;
• Your calls and data exchanges are encrypted using keys computed by the USIM, and these keys are stronger than those provided by SIMs.
• The phonebook is much bigger on the USIM, allowing thousands of contacts (instead of a maximum of 255 in a SIM). Each USIM contact is also richer, for instance it can contain email addresses, a second or third phone number, etc;"
mada, po ovome, kaze da obicna SIM kartica ima kapacitet za 255 kontakata dok USIM ima mnogo veci kapacitet. nisam video ni jednu karticu sa vecim kapacitetom od 255 kontakata..
a opet, na svim ovim karticama sto imamo radi video poziv, ako ga telefon podrzava.. ko je tu lud
