Yes, it is generally safe to use your phone while it is charging. Modern smartphones are designed with safety features to prevent overcharging, overheating, and other potential hazards. However, using your phone while charging may cause the battery to take longer to charge or reduce the battery life over time. It's also important to use a high-quality charger and cable that are compatible with your phone to avoid any potential damage or safety hazards. If you notice any unusual behavior, such as overheating or a swollen battery, stop using your phone and unplug it immediately.