The international roaming service allows Viettel’s subscribers to use their own mobile phone number with services such as SMS, GPRS, EDGE and 3G overseas.
In case roaming subscribers spend less than VND199,000, they will pay the charge regulated by Viettel based on the total output of used data.
Generally, some Vietnamese network operators provide a roaming charge from 10 to 15 USD per megabyte, but some charge $20 per megabyte.
Earlier in October, 2010, Viettel made a breakthrough with a 60 percent discount in its roaming service, making it the cheapest roaming provider in the Vietnamese telecoms market.
Viettel is also the largest roaming coverage provider in Vietnam with 274 networks in 131 countries and territories.
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