Here's the code to create a scatter plot of GDP (gdp) vs. number of phones per 1000 people (phones):
```python
plt.scatter(df["phones"], df["gdp"])
plt.xlabel("Phones per 1000 People")
plt.ylabel("GDP")
plt.title("GDP vs. Phones per 1000 People")
plt.show()
```
We use the `scatter` function from Matplotlib to create a scatter plot of `phones` on the x-axis and `gdp`