How is an international phone call sent and received?

International calls are a very painful question for many business owners who ought to go on business trips and use mobile data in roaming. When you call your coworker from abroad you make an international call. Usually, you have to spend a lot of money on such type of call because of mobile companies that charge too high fees. I solved this problem thanks to Pond Mobile (their website: pondmobile.us) because they allow making international calls for business in more than 200+ countries due to their international roaming plans for business with unlimited Voice, Text and Data. Hope you'll find the answer to your question in my Words. Take care.