BACKGROUND: I have a phone which uses a standard (mini-)SIM. I am thinking about changing to a new phone. The issue is that the new phone requires a micro-SIM. I have never required the use of a micro-SIM before so I never inquired about them when purchasing a local pre-paid SIM on my travels.

My questions are:

• Do carriers [especially in PI, SG, TH, VN] sell micro-SIMs in conjunction with their pre-paid plans?
• What has been your experience using an adapter to fit a micro-SIM into a phone that requires a mini-SIM? [In case I need to switch to my older phone for some reason.]