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Networks on LTE bands 1, 3 (LTE-FDD) are suitable for roaming in ITU Regions 1, 3 and partially Region 2 (e.g. Costa Rica, Venezuela, Brazil and some Caribbean countries or territories. Networks on LTE band 20 (LTE-FDD) are suitable for roaming in ITU Region 1 only.
83 (20 MHz TDD) 141 (2x20 MHz FDD) 46 (20 MHz TDD) 138 (2x20 MHz FDD) With 2x2 MIMO.Enhanced with 20 MHz channels in 802.16-2009 [9] WiMAX rel 2.0: 802.16m: WirelessMAN: MIMO-SOFDMA: 2x2 MIMO 110 (20 MHz TDD) 183 (2x20 MHz FDD) 4x4 MIMO 219 (20 MHz TDD) 365 (2x20 MHz FDD) 2x2 MIMO 70 (20 MHz TDD) 188 (2x20 MHz FDD) 4x4 MIMO 140 (20 MHz TDD) 376 ...
Further, the bands for LTE-TDD overlap with those used for WiMAX, which can easily be upgraded to support LTE-TDD. [79] Despite the differences in how the two types of LTE handle data transmission, LTE-TDD and LTE-FDD share 90 percent of their core technology, making it possible for the same chipsets and networks to use both versions of LTE.
For example, a walkie-talkie or a DECT phone or so-called TDD 4G or 5G phones requires only a single frequency for bidirectional communication, while a cell phone in the so-called FDD mode is a full-duplex device, and generally requires two frequencies to carry the two simultaneous voice channels, one in each direction.
For technical details on LTE and a list of its designated operating frequencies, bands, and roaming possibilities, see LTE frequency bands.; Bands 33 to 53 are assigned to TDD-LTE.
Country or territory Operator VoLTE B1 2100 MHz B3 1800 MHz B7 2600 MHz B8 900 MHz B20 800 MHz B28 700 MHz B32 1500 MHz B38 2600 MHz B40 2300 MHz CA [G 1] schemes Notes Åland Islands Ålcom: 15 MHz, ...
The FDD mode of the APT 700 MHz band plan has been standardized by the 3GPP as the Band 28/n28 (FDD 703-748 / 758 - 803 MHz) and the TDD mode - as the Band 44 (TDD 703 – 803 MHz). The work for the LTE bands was completed at RAN4 #63 meeting in Czech Republic on May 21–25, 2012.
Country Operator Frequency (MHz) Band Duplex mode Launch date Notes Angola 800 20 FDD TBA [1]Multitel: 3500 42 TDD TBA [2] [3] [4] Cameroon Viettel (Nexttel): TBA [5] Equatorial Guinea