What frequency bands should be blocked to block mobile phone signals in Vietnam?

It is essential to understand network suppliers and the frequencies used in the country. Vietnam currently has three main network suppliers: Viettel, Vinaphone and Mobifone. Each of these suppliers uses different frequency bands to provide mobile telephony services to their subscribers.

Viettel:

Frequency band used: 900 MHz (GSM), 1800 MHz (GSM), 2100 MHz (3G), 1800 MHz (4G), 2600 MHz (4G).

Vinaphone:

Frequency band used: 900 MHz (GSM), 1800 MHz (GSM), 2100 MHz (3G), 1800 MHz (4G), 2600 MHz (4G).

Mobifone:

Frequency band used: 900 MHz (GSM), 1800 MHz (GSM), 2100 MHz (3G), 1800 MHz (4G), 2600 MHz (4G).

Now that you know network providers and the frequencies they use in Vietnam, you can take measures to block mobile phone signals. To do this, you should consider blocking the following frequency bands:

900 MHz frequency band:

This band is used by all network suppliers for GSM technologies (2G). By blocking this frequency band, you can disturb the 2G signals of Viettel, Vinaphone and Mobifone.

Frequencies of 1800 MHz:

This band is used by all network suppliers for GSM (2G) and 4G technologies. By blocking this frequency band, you can disturb the 2G and 4G signals of Viettel, Vinaphone and Mobifone.

Frequency band of 2100 MHz:

This band is used by all network providers for 3G technology. By blocking this frequency band, you can disturb the 3G signals of Viettel, Vinaphone and Mobifone.

2600 MHz frequency band:

This band is used by all network providers for 4G technology. By blocking this frequency band, you can disturb the 4G signals of Viettel, Vinaphone and Mobifone.

It is important to note that blocking mobile phone signals can have legal and ethical consequences. Please always comply with the laws and regulations in force in your country and consult the competent authorities before taking any measure to block mobile phone signals.

In conclusion, if you want to block mobile phone signals in Vietnam, you should consider blocking frequency bands of 900 MHz, 1800 MHz, 2100 MHz and 2600 MHz. However, it is important to understand the legal and ethical implications associated with such actions and to consult the appropriate authorities before proceeding.