I recently purchased Swiss (airlines) international SIM. This is a badged Naka SIM (https://www.nakamobile.com/
) with its own tariffs.
It seems pretty sweet, you get UK number, but roaming inwards calls are free in many countries, with callers paying call to UK mobile. Local calls and calls back to Switzerland are pretty cheap to. For South Africa I was paying 0.14c a minute. The data roaming is pretty reasonable too it seems.
However, the Swiss rate card doesnt seem the cheapest Naka tariff (you dont seem to be able to buy direct from them) plus Naka do cards with US numbers, that would likely be generally cheaper for people to call me on. It also doesnt seems to have the VOIP and apps that seem available.
I asked them and they guided me towards www.pilot-com.com
but it all looks a bit clunky there. Does anyone know of other, maybe better Naka based offerings?