I used the sim in
I used the sim in my Samsung over 17days in Sth Korea, Japan and Singapore, it worked flawlessly. Connected to the local networks seamlessly and appeared to have good coverage everywhere. Could not fault and will use next time I travel if my current carrier doesn't provide global roaming in that area. P. S. the sims (2, for my wife and I, she had a similar experience) arrived in the mail within 3 business days.