* Activate 4G at any time on your Samsung Galaxy S9 and benefit of the 4G network of BASE.
* Go to the Start screen.
* To open the menu, swipe up or down on the screen.
* Choose *Mobile networks*.
* Choose *LTE/3G/2G (auto connect)*.
* The Samsung Galaxy S9 has now been configured for use of 4G networks.
* Return to the Start screen.