Very insightful post. When I purchase a phone, I check specifications such as the operating system, memory, battery power and of course the network (4g lte capable or not) . However, I have never once thought about the band. For some reason, I just expected that there were some minimum standard that all phones must comply with and which are applicable across all networks. I have been lucky enough not to experience the problem you friend had but from now onwards, I will definitely remember to add "checking the band" to my list. It quite interesting though that the bands do not increase sequentially. For example, since the Uplink for band 1 is 1920 - 1980, I expected that band 2 will continue from 1980 onwards. Any idea why that is? because from your above analysis, it seems like you can't tell just by looking at the numbering which one may be more "superior" to the other...
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The uplink of band 2 cannot be 1980 as there is always a space left between the uplink and downlink of same band known as band gap in order to reduce signal impairment. It's always good to check the overall specification of a device before buying to ensure it is compatible with the carrier of choice. Thank you.
Yes I understand that the band gap is the difference between the uplink and downlink within the same band, but my question is actually regarding two different bands, i.e. band 1 and band 2. Does the principle of band gaps still apply between bands? I am not sure it does because in band 15, the uplink is 1900 -1920 while the uplink for band 1 is 1920-1980. so there obviously seems to be some continuation there. I just don't understand why the sequence went from band 15 to band 1. Anyway, I was just curious and had to satisfy my left brain lol. Good advice though.
The frequency spectrum allocation is not done sequentially, the governing body (ITU) sometimes allocate the spectrum after others are created. They just look for a spectrum with less number of activities. So it does not really follow any particular sequence.
Oh interesting. Thanks for the info.