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A SIM box (also called a SIM bank) is device used as part of a VoIP gateway installation. It contains a number of SIM cards, which are linked to the gateway but housed and stored separately from it. A SIM box can have SIM cards of different mobile operators installed, permitting it to operate with several GSM gateways located in different places.
'MobiFone Telecommunications Corporation') is a major Vietnamese mobile network operator headquartered in Trung Hoa Nhan Chinh, Hanoi. Founded on 16 April 1993, as a Global System for Mobile Communications launcher, MobiFone is the second largest telecommunications provider in Vietnam (2023).
89 – MobiFone 99 – Gmobile (previously Beeline) In Circular No. 22/2014/TT-BTTTT dated December 22, 2014, all 11-digit mobile phone numbers will be changed into 10-digit numbers, the Ministry of Information and Communications announced in a recent press release.