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Originally Posted by RTuesday
Other than in Mexico, it's the card I find most reliable, especially for SMS.
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Hmm, one can expect this. Since Callkey uses SMS call triggering, reliability of SMS is the crucial point of the solution
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BTW, AFAIK the very first roaming prepaid (from Spain? :unsure: ) also used SMS triggering setting up outgoing calls, but those SMSes were typed in the standard way, without sophisticated SIM applications involved
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