Only caveat I have to add to this already solved problem is:
Most wifi calling/msging apps won't allow you to use the number to sign up for many services that ask you for your phone number. So if there's ever any phone call or text verifications needed you can forget about it (not all the time now, but often enough that it impacted my life at times) ..I believe Snapchat was one such app that I encountered issues with. But don't quote me lol. I know there were a handful of apps that those "TextNow #'s" didn't play nice with
It's not really a big problem.. just a consideration to think about if you use your number in any verification steps in apps you use
Thanks for that suggestion. I understand that as long as I leave my phone on "airplane mode" I will be able to use data when in a WIFI area?
@Ihanrath using airplane mode is probably smart to preserve your battery. That said, it's not really required as your phone just won't be able to use any mobile services at all via the Public Mobile SIM card while you're in Asia (so there's no harm in not using airplane mode).