CallingCards market research

For given list of countries, but not limited to (ask if other countries are of interest - excluded are those of full information available online, like EU, US/Canada ) I'd like to learn (in the way to be confirmed) about working CallingCards. Minimum info - website in english/german/russian, the more info (e.g. distribution or market share/popularity ) the better. As the next, not less important: - possibility to setup own CallingCard in given country = availability of local (in given country) PSTN access numbers with trunks, - availability of DIDs - information about possibility to buy local prepaid SIM cards and its top-up's as wholesale (brand and operator name) - information about how to top-up - possibly online - information about how to check status of credit of prepaid SIM card Countries of interest (at least) : Egypt Morocco Tunisia Turkey Ukraine Thailand India