Ultrahigh band (UHB) architectures for radio frequency (RF) front-ends are disclosed. In certain embodiments, an RF front-end for a mobile device includes a first ultrahigh band transmit/receive module connected to a first antenna, a second ultrahigh band transmit/receive module connected to the first antenna, and a first ultrahigh band receive module connected to a second antenna. The first ultrahigh band transmit/receive module is further connected to the second antenna by way of an auxiliary input of the first ultrahigh band receive module.