I had to buy a new phone (unlocked) while I was in Mexico which came with an ATT sim card. While standing at the counter watching the ATT sales person get my phone ready I told her that I had a T-Mobile SIM card which still worked (thankfully it was not damaged in the broken phone). She finished setting the phone up and then switched the ATT SIM card with my T-Mobile SIM card. Everything seems to be working, I am receiving calls and texts from my regular number.
So what's my question? Well, am I okay on the new phone? Am I using the T-Mobile service (it appears to be that way). Will I still have international (i,e, Mexico) text, data and phone? I'm a bit nervous about this, hence the questions to the community.
