LTE Band Differences Caused Incompability Among Carriers


This post is not going to discuss about which is faster, who download and upload faster or who beat who. But more specifically about the spectrum used by the operator in this case especially Verizon and AT&T. If you are a little concerned on the subject, of course you know that even though they use the same band (LTE 700MHz) but they will not be compatible. Not compatible in this case, such as LTE card from Verizon for LTE devices created for Verizon (Smart phones, MiFi, modems) will not work in a similar device that was created for AT&T.

Both AT&T and Verizon will run their LTE network in the 700 MHz band, but Verizon will use spectrum between 746 and 787 MHz, while AT&T will use 704-746 MHz. MetroPCS, AT&T, Verizon, and Cricket all own LTE spectrum in the 1700-1900 MHz range, and Light Squared owns spectrum around 1500 MHz.


But it is very open possibility in the future there will be a factory that makes LTE phones with multi-frequency in one device. Perhaps we'll soon see it in the near future, depending on the market I guess.

Notes accompanying LTE band tabulations
There are a few notes that can give some background to the LTE bands defined in the table on the previous page.

LTE Band 1: This is one of the paired bands that was defined for the 3G UTRA and 3GPP rel 99.
LTE Band 4: This LTE band was introduced as a new band for the Americas at the World (Administrative) Radio Conference, WRC-2000. This international conference is where international spectrum allocations are agreed. The downlink of band 4 overlaps with the downlink for Band 1. This facilitates roaming.
LTE Band 9: This band overlaps with Band 3 but has different band limits and it is also only intended for use in Japan. This enables roaming to be achieved more easily, and many terminals are defined such that that are dual band 3 + 9
LTE Band 10: This band is an extension to Band 4 and may not be available everywhere. It provides an increase from 45 MHz bandwidth (paired) to 60 MHz paired.
LTE Band 11: This "1500 MHz" band is identified by 3GPP as a Japanese band, but it is allocated globally to the mobile service on a "co-primary basis".
LTE Band 12: This band was previously used for broadcasting and has been released as a result of the "Digital Dividend."
LTE Band 13: This band was previously used for broadcasting and has been released as a result of the "Digital Dividend." The duplex configuration is reversed from the standard, having the uplink higher in frequency than the downlink.
LTE Band 14: This band was previously used for broadcasting and has been released as a result of the "Digital Dividend." The duplex configuration is reversed from the standard, having the uplink higher in frequency than the downlink.
LTE Band 15: This LTE band has been defined by ETSI for use in Europe, but this has not been adopted by 3GPP. This band combines two nominally TDD bands to provide one FDD band.
LTE Band 16: This LTE band has been defined by ETSI for use in Europe, but this has not been adopted by 3GPP. This band combines two nominally TDD bands to provide one FDD band.
LTE Band 17: This band was previously used for broadcasting and has been released as a result of the "Digital Dividend."
LTE Band 20: The duplex configuration is reversed from the standard, having the uplink higher in frequency than the downlink.
LTE Band 21: This "1500 MHz" band is identified by 3GPP as a Japanese band, but it is allocated globally to the mobile service on a "co-primary basis".
LTE Band 24: The duplex configuration is reversed from the standard, having the uplink higher in frequency than the downlink.
LTE Band 33: This was one of the bands defined for unpaired spectrum in Rel 99 of the 3GPP specifications.
LTE Band 34: This was one of the bands defined for unpaired spectrum in Rel 99 of the 3GPP specifications.
LTE Band 38: This band is in the centre band spacing between the uplink and downlink pairs of LTE band 7.

Source: http://www.radio-electronics.com/info/cellulartelecomms/lte-long-term-evolution/lte-frequency-bands-notes.php
Sources related to LTE bands frequency:
http://www.ascom.com/en/tems-fdd-lte-vs-td-lte-12.pdf
http://www.motorola.com/web/Business/Solutions/Industry%20Solutions/Service%20Providers/Wireless%20Operators/LTE/_Document/Static%20Files/LTE_Spectrum_Analysis_White_Paper_New.pdf
http://www.radio-electronics.com/info/cellulartelecomms/lte-long-term-evolution/lte-frequency-spectrum.php