/**
 * Phone
 * 
 * @author Matthew Cheng
 * @version 
 */
public class Phone
{
    private String brandName = "UNKNOWN", modelType = "UNKNOWN", ownerName = "UNKNOWN";
    private int batteryLife = 0;
    private double spaceLeft = 0;
    
    public Phone()
    {
        
    }
    
    public Phone(String owner, String brand, String model, int battery, double space)
    {
        brandName = brand;
        modelType = model;
        ownerName = owner;
        batteryLife = battery;
        spaceLeft = space;
    }

    public void setPhone(String owner, String brand, String model, int battery, double space)
    {
        brandName = brand;
        modelType = model;
        ownerName = owner;
        batteryLife = battery;
        spaceLeft = space;
    }
    
    public String getBrand()
    {
        return brandName;
    }
    
    public void setBrand(String brand)
    {
        brandName = brand;
    }
    
    public String getModel()
    {
        return modelType;
    }
    
    public void setModel(String model)
    {
        modelType = model;
    }
    
    public String getOwner()
    {
        return ownerName;
    }
    
    public void setOwner(String owner)
    {
        ownerName = owner;
    }
        
    public int getBatteryLife()
    {
        return batteryLife;
    }
    
    public void setBatteryLife(int battery)
    {
        batteryLife = battery;
    }
    
    public double getSpace()
    {
        return spaceLeft;
    }
    
    public void setSpace(double space)
    {
        spaceLeft = space;
    }

    public String toString()
    {
        return "This phone belongs to" + ownerName + " and is a " + modelType + " made by " + brandName + " it has " + batteryLife + "% battery left and has " + spaceLeft + " Gb of storage space left.";
    }

}

/**
 * Phone
 * 
 * @author Matthew Cheng
 * @version 
 */
public class Phone
{
    private String brandName = "UNKNOWN", modelType = "UNKNOWN", ownerName = "UNKNOWN";
    private int batteryLife = 0;
    private double spaceLeft = 0;

    public Phone()
    {

    }

    public Phone(String owner, String brand, String model, int battery, double space)
    {
        brandName = brand;
        modelType = model;
        ownerName = owner;
        batteryLife = battery;
        spaceLeft = space;
    }

    public String makeCall(String number)
    {
        return "You dial " + number + " but it seems that you have no provider, so you can't make calls.";
    }
    
    public void setPhone(String owner, String brand, String model, int battery, double space)
    {
        brandName = brand;
        modelType = model;
        ownerName = owner;
        batteryLife = battery;
        spaceLeft = space;
    }

    public String getBrand()
    {
        return brandName;
    }

    public void setBrand(String brand)
    {
        brandName = brand;
    }

    public String getModel()
    {
        return modelType;
    }

    public void setModel(String model)
    {
        modelType = model;
    }

    public String getOwner()
    {
        return ownerName;
    }

    public void setOwner(String owner)
    {
        ownerName = owner;
    }

    public int getBatteryLife()
    {
        return batteryLife;
    }

    public void setBatteryLife(int battery)
    {
        batteryLife = battery;
    }

    public double getSpace()
    {
        return spaceLeft;
    }

    public void setSpace(double space)
    {
        spaceLeft = space;
    }

    public String toString()
    {
        return "This phone belongs to " + ownerName + " and is a " + modelType + " made by " + brandName + " it has " + batteryLife + "% battery left and has " + spaceLeft + " Gb of storage space left.";
    }

}

Update Phone.java