If you plan to block mobile phone signals in Sri Lanka, it is essential to know the frequency bands used by the various country's network providers.
In Sri Lanka, there are several major network suppliers. Here are the exact names of these suppliers and the frequency bands they currently use:
Now that we know network suppliers and frequency bands used in Sri Lanka, we can determine which frequency band to cover to block mobile phone signals. To obtain an effective blocking, it is recommended to cover the frequency bands most commonly used by network suppliers.
The most common frequency bands in Sri Lanka are as follows:
By covering these three frequency bands (900 MHz, 1800 MHz and 2100 MHz), you will be able to effectively block mobile phone signals in Sri Lanka, by preventing phones from accessing mobile networks.
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