What does 128k three-in-one white card mean?

The 128k three-in-one white card means that the SIM card has a capacity of 128k and does not have any business information. This card will only enter the relevant network access information when you select a number in the business hall to access the network; Corresponding to the white card is the finished card. This kind of card has been activated and contains packages and phone charges. It is usually connected to the Internet before purchase.

The operating environment of this tutorial: Windows 7 system, Dell G3 computer.

What does 128k three-in-one white card mean?

The 128k three-in-one card refers to a SIM card with a capacity of 128k and no information about starting any business. This card will only record relevant network access information when selecting a number to access the network in the business hall.

128k: It means that the capacity of this SIM card is 128k. Compared with the general 64K mobile phone card, it can store more mobile phone numbers.

Three-in-one white card refers to: ordinary card, micro card, NANO card, all three conditions are supported, no matter what mobile phone is used, it can be used normally, and there is no need to change it according to the situation of the mobile phone. The mobile number card used.

White card: It is a card that does not open any business. Only when you select a number to access the network in the business hall will the relevant network access information be entered for this card. Corresponding to the white card is the finished card. This kind of card has been activated and contains packages and phone charges. It is usually connected to the Internet before purchase.

Extended information:

Development of mobile phone communication SIM cards

After the popularity of mobile phones, SIM cards have experienced a total of full size SIM cards, Let’s look at the differences between the four stages of mini SIM card, micro SIM card and nano SIM card respectively.

1. Full size SIM card (original card)

The earliest version of the SIM card is similar in size to a standard credit card, that is, similar to an IC phone card, and is generally used in large communication equipment. This card will indicate the SIM card information, such as number or PUK code, etc., so that users can save it after purchase.

2. Mini SIM card (standard card)

Considering the miniaturization of smart phones, starting from 1991, SIM cards have gradually changed into mini SIM cards. Mini SIM cards are generally embedded in the original card, remove it along the cutout and use it. For a long time, we have been using this standard card with us. Since most mobile phones support opening the back cover, it is very simple to replace this SIM card.

3. micro SIM card (small card)

Since 2003, the European Telecommunications Standards Institute has developed a smaller micro SIM card based on the mini SIM card, with specifications larger than The standard card is 52% smaller, and the first commercial model was the iPhone 4 launched in 2010. Since the iPhone 4 product itself is considered a revolutionary innovation in smartphones, this product has directly triggered a wave of card replacement among manufacturers and users.

4. nano SIM card (micro card)

Since 2011, Apple has once again proposed the concept of nano SIM card. At that time, Nokia and BlackBerry also met the standard. The difference is that after The author wants to make the SIM card plug-in and pull-out, similar to micro SD. Considering that Apple's nano SIM card has minimal changes compared to the previous micro SIM card, the standard was eventually adopted by the European Union. The first commercially available mobile phone was the iPhone 5 launched in 2012. The nano SIM card is a full 1/3 smaller than the micro SIM card, and nearly 60% smaller than the standard SIM card.

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