How many short messages and contacts do Unicom's 2G and 3G cards 34K and 62K store respectively?

compared with the traditional 2G SIM card (subscriber identity card), China Unicom's USIM card has a larger capacity (128K card), is more secure and reliable (two-way authentication) and has more powerful functions. It has both 3G and 2G subscriber identity card functions, and is fully compatible with 2G terminals and services. Now Unicom's 3G segment uses the USIM card.

the main features of China Unicom USIM card are as follows: 3G phone book supports 5 contacts, and each contact includes name, mobile phone and fixed phone; Support 2 e-mail addresses; Support 5 short messages; Support OTA services and JAVA applications. (Note: USIM card can store 5 contacts in 3G mobile phone, but only 25 contacts in 2G mobile phone).

ordinary SIM cards have capacities of 16K, 32K and 64K. 32K can store 1 contacts and 2 short messages, and 64K can store 25 contacts and 4 short messages.