From Boost Mobile's website:
With Todo Mexico PLUS - Stay connected with friends and family in Mexico and keep in touch with everyone back home when you travel to Mexico!
- Unlimited Calling from US to Canada and Mexico.
- Unlimited SMS from US to 200+ countries including Canada and Mexico.
- Unlimited Calling to US and Mexico while in Mexico.
- Unlimited SMS to Mexico and US while in Mexico.
- 1.5GB data while roaming in Mexico