The new generation of networks, 5G, has been under construction for some time. Now you might wonder “Can I use a 4G SIM in a 5G router?”

The answer is YES, and that brings another question: Can we use 5g data with 4G sim card?

The answer is also YES. It depends on the equipment you are using. Let’s take cell phone for example.

Due to the use of frequency bands and new technologies in THE 5G network, 4G products equipped with 4G baseband cannot use the 5G network simply by inserting a 5G mobile phone card. They can only use the 5G network after changing to a mobile phone that supports 5G.

4G mobile phones still need to be compatible with 3G network to maintain network connection when 4G signal is not good and stable. Therefore, 5G SIM cards can support 4G network access, so 4G mobile phones can be used normally.

5G network need to upgrade a mobile phone is because there are a lot of new technology in 5G network needs the support of the 5G baseband and SIM card in the mobile phone is a identification, storage, information such as your phone number verification card, itself does not participate in the 5G communication of data exchange, so the 4G mobile phone SIM card is also able to transition to 5G in the network, 5G cards are also available in 4G phones.

In a word, routers or cell phones can support any sim card, but using whicn kind of data is depend on the routers/phones itself. 4G network will need routers/phones support 4G FDD/TDD network, and 5G network will need routers/phones support 5G NR network.