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.
Read moreCan I change LTE bands?
Most modern Samsung phones support around 15 LTE bands. With the help of an app, you can manually switch which of these bands you are using , potentially improving performance dramatically.28 Tem 2020
Read more