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Band 7, Band 20, Band 28 - Hardware Questions

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Hi everyone,


So, Band 7 is essentially the FDD version of Band 41 (band 41 actually covers an even wider spread of spectrum), and is essentially the by far the most widespread LTE band world wide, along with band 3. Band 20 is the European digital dividend spectrum, basically their equivalent of our 700mhz spectrum, and has some overlap with band 26. Band 28 is the "APT" configuration for 700mhz spectrum - it theoretically overlaps the same spectrum as bands 12, 13, 17 do in the US and Canada, but with different configuration which requires a different hardware configuration.


My questions are: how hard would is be to include band 7 support on Sprint phones? This is turning into a (the) major international band for LTE and from what I can see, pretty much all new phones from AT&T, Verizon, and T-Mobile support at least band 7 for international roaming. It would be great to have.

A similar question to that above about band 20.


My question about band 28 is a little bit different - CAN there be cross compatibility between the user hardware for the APT configuration of 700mhz spectrum and the FCC configuration? What are the technical hurdles that stand in the way of that?


I look forward to hearing from people who actually know!!




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