Used it in US, all was ok, except for one call that I made to a number starting with+1, but didn’t realise it was Canadian number! Thought it would be a "Free outgoing call", but was billed$68 for that call, because it was a "Charged International call"!
For all practical purpose Canada numbers are treated as North American local calls, but not for MATRIX!
My Account Number was 1255779.
PS: Just noticed that all the positive reviews in this forum are labelled Fake:) should have been wary of this company earlier. Will welcome ideas on which are other good international sim cards primarily for data and incoming.