input: Write a python function to fill out a phone number form on a web page using Selenium.
  assert fill_phone_form('https://www.example.com/form', '1234567890') is None  # Replace with actual assert checks if necessary
  assert fill_phone_form('https://www.example.com/form', '0987654321') is None  # Replace with actual assert checks if necessary
output: def fill_phone_form(url, phone_number):
      from selenium import webdriver
      from selenium.webdriver.common.by import By
      from selenium.webdriver.common.keys import Keys
      from selenium.webdriver.chrome.service import Service
      from webdriver_manager.chrome import ChromeDriverManager
  
      # Set up the web driver
      driver = webdriver.Chrome(service=Service(ChromeDriverManager().install()))
  
      try:
          # Open the URL
          driver.get(url)
          
          # Locate the phone number input field (assuming it has an id 'phone')
          phone_field = driver.find_element(By.ID, 'phone')
          
          # Fill in the phone number
          phone_field.send_keys(phone_number)
          
          # Submit the form (assuming there's a submit button with id 'submit')
          submit_button = driver.find_element(By.ID, 'submit')
          submit_button.click()
      finally:
          # Close the browser
          driver.quit()