Which is the best international phone card to call South Africa or Tanzania?
Find corner shops or little stands that you find in bus stations or subways, they tend to have posters for these kind of sim cards. When I see them, there are usually about 7 or 8 together, giving you a lot of choice. If you cant find any, ask at the counter if they sell international sim cards. Read the small print, as most will charge a cost per day after you register the sim. I know there is one that has no extra charges, but I cannot remember the name of the company. If you look in newsagents, bus stations etc they are often advertised.
