* Activate 4G at any time on your Apple iPhone 11 Pro Max and benefit of the 4G network of BASE.
* Go to the Start screen.
* Choose *Settings*.
* Scroll down.
* Choose *Mobile Data*.
* Choose *Mobile Data Options*.
* Choose an option, in this case, *4G, VoLTE On*.
* The Apple iPhone 11 Pro Max has now been configured for use of 4G networks.
* Return to the Start screen.