Our Telcel SIMs have the fastest service available in Mexico. Carriers that include service to Mexico are usually limited by speed (throttled) and by network (no 4G or LTE).
You can easily check your Telcel SIM speed here; www.speedtest.com
In the popular Cancun/Riviera Maya, you can expect speeds of about 30MBPS in download and 10MBPS in upload.
Telcel has the most extensive network in Mexico. Most populations are covered even in very remote areas of the country.
For extra info on the coverage, please consult www.opensignal.com