Clay Telecom mite proclaim themselves to be the best international sim card option, but trust me I have used their services mostly for UK and France not once but thrice and their services are very very substandard. Things are always delivered last minute with no proper details, and they hardly ever informed me about flag fall call charges in France. And they don’t care whether you received the bill or not, they will directly charge ur credit card with whatever amount they deem fit. Very substandard service