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Amazing 400mhz GSM
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Operation in the 400MHz band offers an advantage in coverage over other systems operating in higher frequencies, as a signal attenuates less at lower frequencies. This means less investment costs for the operator, as fewer cell sites are required to cover rural and coastal areas and highways. With its inherent better propagation characteristics, GSM 400 offers more efficient coverage than the higher frequency variants of GSM. This means that operators need to deploy fewer sites; GSM 400 covers the same area as GSM 1800 with a fifth of the number of sites and the same area as GSM 900 with half the amount of sites. The potential cell range is up to 120 km. Furthermore, where a GSM network infrastructure already exists, much of it can be reused by GSM 400, reducing network investment costs further.

The radio coverage area for a GSM 400 BTS site will exceed the radio cover provided by both GSM900 BTS and GSM 1800 BTS sites. Due to the predicted radio coverage that will be available with the implementation of GSM 400 radio site, the extended cell feature will be an integral part of the new frequency.