TrueSmart M821H 4G HD Voice LTE Dual SIM Compatibility on CSL (Hong Kong) Mobile Network
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Device Model
TrueSmart M821H 4G HD Voice LTE Dual SIM
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Carrier
CSL
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Country
Hong Kong 
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TrueSmart M821H 4G HD Voice LTE Dual SIM is compatible with 6 out of 6 bands on CSL (Hong Kong). See the tables below for details.
Frequency Bands Used by CSL (Hong Kong)
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 |
Supported GSM Protocols
| Name | Generation | Supported by device? |
|---|---|---|
| GPRS | 2.5G | Yes |
| EDGE | 2.5G | Yes |
UMTS
Compatibility - 2 out of 2 bands supported
| Interface | Name | Supported by device? |
|---|---|---|
| UMTS | B1 (2100 MHz) | Yes |
| UMTS | B8 (900 MHz GSM) | Yes |
Supported UMTS Protocols
| Name | Generation | Supported by device? |
|---|---|---|
| UMTS | 3G | Yes |
| HSPA+ | 3.5G (4G speed) | Yes |
LTE
Compatibility - 2 out of 2 bands supported
| Interface | Name | Supported by device? |
|---|---|---|
| LTE | B3 (1800 MHz +) | Yes |
| LTE | B7 (2600 MHz) | Yes |
Supported LTE Protocols
| Name | Generation | Supported by device? |
|---|---|---|
| LTE | 4G | Yes |
| LTE-A | 4G | 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.
