I am going to Mexico for 2 weeks. I don't think I need to buy a Mexican sim card as I can use wifi there for everything I need. Do I need to REMOVE my Koodo sim card from my phone in order to not get phone calls, texts, etc?
Airplane mode should suffice. As long as you dont send texts, dont answer any calls, and have data off you should be fine. However removing your sim card just to be safe the the sure fire way to avoid any unex[ected roaming charges