A:AnswerI was able to use my T-mobile smartphone outside of the US (China, Japan, Thailand). My understanding is that there are two options on how to do so:
1. Contact T-mobile and have them unlock your phone so that you can then purchase a sim card from a carrier that will allow you to use the phone internationally. That sim card will then assign your phone a phone number specific to the country you buy it from and people will only be able to call/text you at that number. You'll be able to call/text whoever you want based on what plan you get with that sim card.
2. If you have a data plan and your phone has wi-fi calling capability then you can make calls anywhere via wi-fi (you can also send texts and use internet etc. this way too). I ended up going with this option. This way people could call and text me back and forth and vice versa. It was a pretty smooth process, but remember you have to have a wi-fi call capable phone to make wi-fi calls AND you want to be mindful of what data plan you have (thankfully, I'm on the unlimited date plan, so it was all good and convenient for me to go with this option). Also remember you'll possibly be limited in your ability to call/text/internet from your phone if you end up in an area that doesn't have wi-fi.
A:AnswerNot it has to have a Sim card slot and also needs to have a network support of 1 G 2 G 3 G or 4 G or 4 G LTE service for it to support a Sim card, it also depends on the brand and model so if it's Verizon GPS I Would call Verizon to see the compatibility just an example. OK hope I helped you.
