Will my iPhone 4 work in Mexico?

I'm going to Queretaro & Jalisco in the summer and I need my phone. The households don't have Wi-Fi. Or at least the one in Queretaro. So can I use it? I've seen other questions and it says I can use Verizon (my carrier) as telcel by calling Verizon's 1800 number. I have a LIMITED data plan and texting and calling is unlimited

If you have an international plan

  • Would the iphone 5s work in Mexico? I have an aunt that wants the iphone 5s and she lives in Mexico so I call apple store to see if they have the iphone 5s unlocked and they said that is coming out in a month and I was looking at the tmobile one but I want to know if that one would work in Mexico? Or the Verizon?
  • Will Verizon charge me more if I use my iPhone in Mexico? I live in the US, but will be traveling to Mexico within the next month. Will Verizon charge me if I go onto Twitter or Instagram or Facebook while in Mexico?
  • Will my iPhone work in Mexico? Well my iPhone has been blacklisted by my parents and since its unlocked I was wondering since I'm going to Mexico for vacation would it work there with a Telcel sim since its only blacklisted in the US
  • Will my iPhone work in Mexico with Telcel Sim? Well my iPhone has been blacklisted by my parents and since its unlocked I was wondering since I'm going to Mexico for vacation would it work there with a Telcel sim (It's an AT&T iPhone) or is it blacklisted by AT&T globally?