For the coverage BTS sites, the tool assumes 100%
coverage for the urban areas, and a limited (varying) one for
the suburban and rural areas (further details below). The band
for this coverage is assumed to be 900 MHz, with a 5 MHz
band per carrier. The cell range for a single BTS site is either
1.4 km (urban areas), 4.2 km (suburban) or 13 km (rural).
Each coverage BTS costs 25000 euros for the operator. The
main purpose of these sites is to bring 3G LTE available in
every part of the desired area.