After-sales service: after-sales service is quite good Viettel, warranty all the products and services offered, long warranty period providing credit to customers, thereby strengthening corporate reputation.
- preferences of services: customers are served in separate area for VIP guests at the supermarket operator, Viettel centers nationwide, prioritize answer before calling phone number 19008198, barring postponed, is set installation and testing of new services.
-Advantage cost incentives: exemption charges when using the services of value-added services
to increase, receiving an annual birthday ....
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