Try this. Go to Settings > Cellular. First make sure Cellular Data is toggled on. Next, scroll down where you start seeing apps listed with toggles to the right of them. Make sure that the toggle is on (green) for App Store.
Try this. Go to Settings > Cellular. First make sure Cellular Data is toggled on. Next, scroll down where you start seeing apps listed with toggles to the right of them. Make sure that the toggle is on (green) for App Store.