Introduction: Phone AMPLIFIER
i cant think about something to say.
a pen, a plastic cup, a tea box, duct tape, a wooden skewer and an utility knife.
Step 1: Step 1: Mark Your Cuts
mark two places: the place for the phone, and the place for the cup.
Step 2: Step 2: Cut Your Markings
cut the places you marked.
Step 3: Step 3: Cut the Bottom
cut the bottom of the plastic cup.
Step 4: Step 4: Put the Cup in the Hole
put the cup in the hole.
Step 5: Step 5: the Finishing Touch
put the skewer in his place, reinforce the cup with duct tape, and your done.