Methods, systems, and devices for wireless communications are described. In a wireless communications system, a user equipment (UE) may use intelligent transmission selection for enhancing uplink performance. The UE may identify a quantity of tuneaway occasions in which the UE is to tune away at least one radio frequency (RF) chain of multiple RF chain from a first subscription to a second subscription. The UE may identify a conflict for an uplink transmission associated with the first subscription during a first tuneaway occasion. The UE may switch the uplink transmission from one or more first RF chains to one or more available second RF chains based on the conflict, and the UE may transmit the uplink transmission using the one or more available second RF chains based on the switching.