How do I change my cellular band?

Settings> About Phone> Tap 5 times on internal memory> Now you are in Testing menu> Select the Phone information1 for SIM 1 or Phone information2 for SIM 2> Scroll down to find Set preferred network type and select it> From the list select the one you want and go back to home.

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How does Samsung choose 4G band?

On the new page, open the side menu by selecting the three horizontal lines in the upper-left corner, then choose “Band Selection.” Here you will see a list of all supported bands on your phone, including LTE and 5G. You want to switch to a supported LTE band of your carrier. To help, review the list below.

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