Microsoft Lumia 640 3G Compatibility on Viettel Mobile (Vietnam) Mobile Network
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Device Model
Microsoft Lumia 640 3G
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Carrier
Viettel Mobile
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Country
Vietnam
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Microsoft Lumia 640 3G is compatible with 4 out of 5 bands on Viettel Mobile (Vietnam). See the tables below for details.
Frequency Bands Used by Viettel Mobile (Vietnam)
Select a band or interface for more details
GSM
Compatibility - 2 out of 2 bands supported
Interface | Name | Supported by device? |
---|---|---|
GSM | 900 MHz (E-GSM) | Yes |
GSM | 1800 MHz (DCS) | Yes |
UMTS
Compatibility - 2 out of 2 bands supported
Interface | Name | Supported by device? |
---|---|---|
UMTS | B1 (2100 MHz) | Yes |
UMTS | B2 (1900 MHz PCS) | Yes |
LTE
Compatibility - 0 out of 1 band supported
Interface | Name | Supported by device? |
---|---|---|
LTE | B3 (1800 MHz +) | No |
* A matching frequency band does not guarantee coverage. There may be additional network or device software restrictions that prevent a device from connecting on a certain frequency. Additionally, certain bands may only be available regionally within a country.