Statement:
In South Africa, mobile Internet is on average less expensive than in Mexico

In the Most expensive mobile internet rating South Africa holds position #77 ²⁰²² out of 204 and Mexico is #56 out of 204 ²⁰²².
Position of South Africa is better than position of Mexico.
Both countries holds average positions in the "Most expensive mobile internet" rating. So Average price of 1GB (USD) is an average for both South Africa and Mexico, compared to most countries of the World.

Referencies:

1. Most expensive mobile internet ²⁰²² by cable.co.uk

   The countries in the rating sorted by 'Average price of 1GB (USD)' in descending order.

   Mexico	'Average price of 1GB (USD)' value is	2.89
   South Africa	'Average price of 1GB (USD)' value is	2.04