ISD Call is one of the leading VoIP (Voice over Internet Protocol) Service Provider specialising in Internet Telephony Solutions for various businesses, Our vision is to emerge as a major VoIP Service Provider by integrating telephony system with the cont
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United World Telecom is a leading switch-based telecommunications service provider, located in Florida, USA, serving retail, wholesale, and corporate customers worldwide. Established in 1996, United World Telecom has rapidly expanded its global presence i
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