Abstract: Systems, methods, apparatuses, and media are provided for use of multi-RAT user equipment. Communication may be performed using a first radio access technology on a first transceiver. A diversity receiver may be used to provide spatial diversity for the communication using the first radio access technology. Use of the diversity receiver to provide spatial diversity for the communication using the first radio access technology may be stopped. Use of the diversity receiver to communicate using a second radio access technology may be started, with the communication using the first radio access technology continuing on the first transceiver.

Abstract: Methods and apparatus for improving system acquisition performance in multi-SIM devices are provided. In one aspect, a method of acquiring a signal comprises defining a size of a frequency bin for a first radio access technology based on a frequency error for a second radio access technology. The method further includes determining that the signal is not acquirable using the defined size for a predetermined number of consecutive acquisition attempts. The method further includes adjusting the size of the frequency bin based on the determining. The method further includes determining whether the signal is not acquirable using the adjusted size. In one implementation, the method further includes identifying the frequency error for the second radio access technology. In one implementation, the adjusting the size of the frequency bin comprises disregarding the frequency error for the second radio access technology.