Talk:Cellular frequencies in the United States

message: So, wait, if I had a scanner or other receiver that could receive those frequencies, could I listen to people's cell phone conversations.. or do most carriers use some form of encryption?  
I think only AMPS and N-AMPS were not encrypted.  The US Courts ruled (need ref) that if you make any kind of attempt to encrypt the transmission then it is protected otherwise it is free to intercept.  As of 2021, all modern mobile telephone transmissions are encrypted. Mrdvt92 (talk) 20:03, 25 May 2021 (UTC)
thread_title:  Privacy? 

message: Why is a significant part of this article focused on the US only? To the point where it includes information of the frequency bands used by the major carriers, when there is another article that should take care of that. Frequency spectrum regulation happens in every country, and the specifics of the US alone would probably warrant an entirely different article. This one should be used for a more generalized/global view without getting into certain regional specifics.  — Preceding unsigned comment added by 50.133.129.84 (talk) 15:41, 23 July 2012 (UTC)
thread_title:  US focus 

message: If you look at https://en.wikipedia.org/wiki/Cellular_frequencies_in_the_US you will see a number of bands such as 800, 850, 1900, 1700 2100, L700, U700, etc. So my question is can somebody here actually tell me what the upper and lower frequency bounds of each of these bands are? Also there are several sets of bounds. For example there's the 800 band listed with 2G, the 800 band listed with 3G, and the 800 band listed with 4G LTE. My question is do each of those bands have the same upper and lower bounds? Or does each of those 800 bands have different upper and lower bounds? And where can I find this information? Wikipedia doesn't seem to have it. 2601:601:F00:1010:6CEE:4A:7A47:BA4D (talk) 20:24, 15 February 2017 (UTC)
replies: text: Hi. Please refer to LTE frequency bands, UMTS frequency bands and GSM frequency bands. These tables hold all information you are looking for. Nightwalker-87 (talk) 19:03, 16 February 2017 (UTC)
thread_title:  What are the bands' bounds? 

message: The US will use band 48 for the CBRS band. See 3GPP report 36.744 https://portal.3gpp.org/desktopmodules/Specifications/SpecificationDetails.aspx?specificationId=3103. Quote:
Operating band number and the EARFCN allocated for 3.5GHz TDD band in the USA (3550-3700 MHz) are outlined in Table 9-1 and 9-2 respectively.
E UTRA Operating Band: [48]
E-UTRA channel numbers: 55240 – 56739
:Thanks for the note. So far everything looked like as if band 42 would be harmonized by ITU in Regions 1, 2 and 3 including the US. So now there is another fragmentation on the horizon - so sad...  I found the new band here in the meanwhile: ETSI TS 136 101 V14.3.0 (2017-04) - LTE; E-UTRA; User Equipment (UE) radio transmission and reception (3GPP TS 36.101 version 14.3.0 Release 14) Everything is fine. Nightwalker-87 (talk) 17:05, 21 April 2017 (UTC)
replies: text: Well, but that is in general a major intention of ITU an regional spectrum management groups and regulatory bodies. Examples are APT 700, EUDD800, IMT 2000, B40 @2300MHz, IMT-E 2600, L-Band 1500. When looking at the E-UTRA band list specified by 3GPP one finds that most fragmentation seems to occur in the US, while quite a few other bands are widely deployed across the globe. So this is actually not the point. As one can see it is indeed possible. Nightwalker-87 (talk) 21:55, 21 April 2017 (UTC)

text: Surprisingly the USDD600 bandplan makes use of 5 MHz blocks instead of maintaining the old TV frequency grid that caused fragmentation leading to reduced availablitiy of bandwidth in the 700 MHz range. Further it is compatible with both APT700 and LSMH/USMH700 band plans. This makes it likely that it will come into use in other parts of the world in future. Looking back, though the 700 MHz band was availble very soon, this fact reduced device compatibility in early years and somehow inhibited mobile development with a view to LTE, especially when looking at other countries. So actually the FCC practise then was more or less contraproductive. If they proceeded as they did now with the USDD600 bandplan the world would have seen an APT700-like bandplan to be adopted from 2008 on already... Nightwalker-87 (talk) 09:27, 22 April 2017 (UTC)
thread_title:  CBRS band 

message: T-Mobilehttps://newsroom.t-mobile.com/news-and-blogs/lte-u-launch.htm and Verizon are starting to deploy LTE-U in unlicensed spectrum. See T-Mobile Galaxy S8 supported bands. T-Mobile and Verizon are open to deploying LTE-LAA (band 46) but due to urgency and equipment availability they are starting with LTE-U. Sbsail (talk) 20:47, 21 April 2017 (UTC)
thread_title:  LTE in unlicensed spectrum 

message: The table has no explanation as to why all 2G & 3G uses of the 1900 PCS band (except US Cellular), and T-Mobile's 3G use of the 1700/2100 AWS band, are in yellow instead of green or red (obviously "yes" & "no" respectively). It can't mean limited licenses; T-Mobile's single 800 CLR license is in green in the LTE section. It could mean legacy, but if so why aren't all non-LTE boxes flagged that way? --RBBrittain (talk) 09:38, 3 February 2018 (UTC)
replies: text: Hi RBBrittain. I've added a legend and updated the table to clarify. Mainly the PCS1900 band is currently being refarmed. Depending on the spectrum allocation in the individual regional/local markets, operators try to use larger contiguous spectrum blocks for 4G/LTE, leaving non-contiguous blocks for legacy 2G/3G services. CDMA services are tentatively shifted to 800 or 850 MHz. Verizon for example plans to use remaining CDMA technology for IoT. In general it is difficult to draw the whole picture due to the fragmented mobile market in the US with different types of spectrum licenses. Nightwalker-87 (talk) 12:22, 3 February 2018 (UTC)
thread_title:  Yellow boxes in table 

message: I think this page would be the correct place to add the UAV restriction of use on particular cellular frequencies since many of the mobile radio bands restrict use to Land Mobile or Mobile except aeronautical mobile.  Where as the PCS band allows for MOBILE use which includes land, maritime and aeronautical. Mrdvt92 (talk) 20:13, 25 May 2021 (UTC)
replies: text: There are in general many other restrictions for specific uses, too numerous in fact to list here.  I don't feel that it's necessary to list a sole restriction on UAVs. ebahapo (talk) 17:10, 31 May 2021 (UTC)
thread_title:  Unmanned Aerial Vehicle (UAV) use of Cellular Frequencies in the USA