Tianjin mobile sim card problem

There should be no concept of these three areas. It's just that this is a large-capacity SIM card newly launched by the mobile company. The phone book should be 1000. It also includes some other mobile value-added services, such as Monternet service, as well as new functions such as business card book, short message group sending and dynamic allocation of memory space. But the compatibility of this card is not very good. Ordinary old mobile phones may not support it. Even today's new mobile phones often have compatibility problems. It is recommended not to replace it easily, because the mobile company has not promoted it on a large scale, mainly because of compatibility problems. Now there are 32K SIM cards, and some mobile phones don't support them.