Part number : WFR1620
Manufacturer : Qualcomm
Functions : The Qualcomm WFR1620 receive-only companion chip is required for implementation of carrier aggregation with the WTR1625L.
WFR1620 (Receive Only), WTR1625L (Transceiver)
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WFR1620 Datasheet PDF
WTR1625L supports all cellular modes and bands that are currently fully specified in 3GPP. An additional, much smaller WFR1620 receive-only companion chip is required for implementation of carrier aggregation with WTR1625L.