What is the difference between three networks and all networks?

The differences between Three Netcom and All Netcom are: 1. All Netcom can definitely achieve Three Netcom, but Three Netcom may not be able to achieve All Netcom; 2. Three Netcom refers to the SIM cards of three domestic telecom operators. It can be used normally, but it can only use the 3G/4G network of China Telecom. If you use the SIM card of China Mobile or China Unicom, you can only use the 2G network. Full Netcom refers to terminal products that support six modes. These six types of mobile communications Standards include TD-LTE, FDD-LTE, TD-SCDMA, CDMA (EVDO, 2000), WCDMA, and GSM.

The operating environment of this tutorial: Hongmeng 3.0.0.215 system, Huawei P50 Pro mobile phone.

Three Netcoms cannot actually be equated with All Netcom. Mobile phones with All Netcom will definitely be able to achieve "Three Netcoms", while mobile phones with Three Netcoms may not be able to achieve "Full Netcom". This is because only mobile phones that support the 2G/3G/4G networks of three operators and a total of six mobile communication standards can be called true full-network mobile phones.

# Before all-Netcom mobile phones were available, customized mobile phones from various telecom operators were actually popular. I think many friends are familiar with it. In the business hall of China Mobile or China Unicom, there are many new smartphones. If you buy them, you can only use their SIM card. Although the customized version of the mobile phone (contract phone) has a greater discount, the mandatory setting of only one SIM card can still cause a bad experience. Therefore, full Netcom has become the mobile phone configuration that many friends want.

The concept of All-Netcom mobile phones was first proposed by China Telecom, but in fact All-Netcom at that time was just "Three Networks". Three Netcom means that the SIM cards of the three domestic telecom operators can be used normally, but they can only use the 3G/4G network of China Telecom. If you use the SIM card of China Mobile or China Unicom, you can only use the 2G network. Therefore, there is still a certain gap between this kind of three-network communication and full network communication, but it is still more advantageous than the contract-customized machine. After all, it can have an additional secondary card from another operator for daily communication such as phone calls and text messages.

The current full-net mobile phones in the true sense refer to terminal products that support six modes. These six mobile communication standards include TD-LTE, FDD-LTE, TD-SCDMA, and CDMA (EVDO, 2000) ,WCDMA,GSM. There is also a smart terminal product that supports five modes (not supporting CDMA), which is usually called a "quasi-full Netcom mobile phone". The quasi-all-Network mobile phone can meet 70% of the demand and is an important support for the name of "all-Network mobile phone". At present, the cumulative sales volume of all Netcom mobile phones has reached 1 billion, meeting the needs of many domestic users and becoming the absolute mainstream of today's mobile phones.

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