After you shoot film and developed in to negative so you cannot view it with positive look. You must scan picture from film to image on mobile phone with many tools.

Now I suggest the easy way which I discoverd.

1 Use white box that light can shine through the material and put you black and white film on it and use the lamp shine in the box. Take a photo by mobile phone with steady shot I use stainless tank as a tripod and capture with photo app in mobile device.

2 After you have a picture like this so go into negative image app for changing the negative color into postive color.

3 Use snapseed to crop the image into the square format and snapseed can adjust the color response of image. Use curve function in snapseed to leveled the dark and white point

Finally you have the good image from your favorite film.