Managing data usage across both lines is another potential problem. It is possible for users to unintentionally use data from one line when they meant to use another, which could result in overages or unexpected fees. It is advised that userssbi yono application frequently check their data usage through the "Cellular" settings and set limits or alerts as needed to reduce this risk. Setting Up Preferences for Data. Confusion can also be avoided and users can always be connected in a way that best suits their needs by making sure that both lines have their data preferences set correctly. Users can take advantage of the dual SIM functionality on their iPhone 15 without having to deal with needless problems by following these precautions.