Please check actual Surfroam rates if 4G supports on your location.

Then please check next:

Surfroam SIM is placed into SLOT 1

Data connection type set to 4G Data&Voice

APN profile globaldata installed

Then go to Carrier/Network selection and set it to Manual.

Wait for list of available operators.

You will see networks with band mark like 3G, 4G.

Choose manually network with 4G mark.

Restart and check connection.
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