Some rules of thumb;
Higher the frequency the lower the coverage
more power required to cover same distance
Lower the frequency the better in-building coverage
less likely to be reflected by building material
This is why companies such as TelecomNZ and VodafoneNZ prefer to deploy their nationwide 3G networks at 850 and 900MHz, respectively, rather than 2100MHz. 2100Mhz is primarily used in Urban/high customer density areas due to the smaller cell coverage area required.
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Comment by paradoxsm, on 3-Apr-2009 21:05
2100 can also offer slightly better performance for dataspeeds and it's a whole seperate band channel so it really does make sense to have both bands in the congested areas even for all 2100's apparent coverage "pitfalls".
Comment by Chris, on 4-Apr-2009 10:43
"Lower the frequency the better in-building coverage
less likely to be reflected by building material"
I currently go to high school. In year 12 physics we learned that lower frequencys give you better rarefaction (fancy word for reflection) and that's why they work better, as they will deflect around the obstacles.
But I did fail physics last year and I could easily be wrong.
Comment by Robert, on 29-May-2009 10:58
Higher frequecies are more easily absorbed by material and don't reflect as well. This is why the darker colours are at the top end of the colour spectrum.