Where is the Sim card location?Does it support 4g network?

Q:Where is the Sim card location?Does it support 4g network?

A: Thanks for your  information.

You need to choose the 3G module when you place order to use the SIM card.With this 3g module, you can connect to 3G or 4G  internet by inserting an SIM card to it.

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Sophia