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DRNewcomb · 03-09-2006, 23:22

Remember that most countries charge a premium for you to call a mobile number in that country. If the retail premium you pay to call a mobile number in X is cheaper than wholesale premium the carrier in Y charges X to roam in Y, then a SIM from X can roam in Y and the carrier can pocket a small profit from the difference in the prices. The key to understanding the situation is that wholesale roaming rates are much cheaper than the carriers have let on to anyone.

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DRNewcomb (Offline) Senior Member Prepaid Professionist Posts: 1,465 Join Date: 27 Feb 2004 Location: Mississippi, USA Country:	03-09-2006, 23:22 Remember that most countries charge a premium for you to call a mobile number in that country. If the retail premium you pay to call a mobile number in X is cheaper than wholesale premium the carrier in Y charges X to roam in Y, then a SIM from X can roam in Y and the carrier can pocket a small profit from the difference in the prices. The key to understanding the situation is that wholesale roaming rates are much cheaper than the carriers have let on to anyone.