I have iMessage on my iPhone 6+ and MacBook (Yosemite). In the US, if another iPhone user message me, I'll receive it as iMessage. If non-iPhone user does, I'll receive it as SMS (normal text). BOTH method will be received in the iPhone AND MacBook. Now if I travel abroad, I usually get a local SIM card. Assuming it does not come with data but I'll have a local number. My questions are: 1). If a user (iPhone or not) in the local country message my local number, do I receive it as SMS? 2). If a user (iPhone) in the US message my local number, do I receive it as SMS? 3). Let's say now I have Wifi connection while traveling abroad but with the local SIM, hence I now have data connection. If I send a message to a local number OR US number, does it get send as SMS or iMessage? 4). Since now I have a local number, what happened if someone try to message my US number (iPhone user or not)? Will the message get delivered UNTIL I swap back the US SIM card? Sorry for the detailed questions, but I want to make sure I can send and receive normal SMS message when I am using a local SIM in another country.