do not write the bulletpoints on your resumé like this

instead do this

your employer doesn’t care about what you actually did as much as they care about how you contributed to the workplace / “their bottom line” - saying you answered phone calls doesn’t tell them what you actually did to help their bottom line, but explaining “how” you did your job (in layman’s terms, in this case, “I helped customers fix their problems and learn more about the things we sell”) helps them figure out how they can use you

best of luck on your jobbing!