Can Mightytext operate even if I'm browsing abroad?

[fridaygirl]

Hi all. I just recently installed Mightytext in the hopes that I would be able to receive and send SMS from my local mobile number even if I'm abroad. I will be going away only for a few weeks and I'll be leaving my phone in the hands of our house help who knows virtually nothing about operating a smart phone. I've just instructed her to make sure that it never goes without power and it's the only thing I can trust her with. I will be bringing abroad a different sim from another operator which has cheaper international rates yet I still need to be able to access my original local sim for work purposes. I would like to know if this is possible to do with the Mightytext app. Hope to hear from any of you soon. Thanks!