This is how to make a cheap phone speaker for any phone. Easy to make and barely costs anything.
Step 1: The Phone Slot
Get a cardboard tube from a toilet paper role. Cut a slot the size of your phone into the cardboard.
Step 2: Create the Sound Amplifiers.
Cut a hole the same size of the circumference of the cardboard tube into the side of a paper cup. Do the same thing to another cup.
Step 3: Final Product
Put both cups onto the cardboard tube and put your phone into the cardboard tube. Now you're finished.