As noted above, features as described herein may be used to define some signaling in the LTE and/or NR such that each UE can indicate to the network the actual MSD required for each supported EN-DC/CA/DC configuration. In regard to maximum sensitivity degradation (MSD), as discussed in 3GPP R4-1901880, a number of FDD-TDD EN-DC configurations have been defined in the Rel-15 3GPP TS 38.101-3 NR specification. For EN-DC configurations, where the uplink channel frequency (especially NR) is close to, or has a harmonic relationship with, the downlink channel frequency (especially LTE), or two or more uplink channel frequencies transmitted simultaneously generate intermodulation (IMD) product with relation to at least one downlink channel frequency being received by the UE, the downlink reference sensitivity is expected to be degraded if simultaneous transmission on the uplink of the aggressor is present. For example, a NR uplink channel frequency in the TDD band may be close to an LTE downlink channel frequency for an EN-DC configuration in an FDD band. Typical UE implementations may use filters which do not have steep or much out-of-band attenuation in the TDD band since there is no self-band protection required which enables lower front-end insertion loss which is beneficial for coverage. This has the consequence that the spurious and out-of-band emissions rejection to nearby bands is also then lower. In addition, NR has much wider bandwidths than LTE in many FR1 bands supporting up to 100 MHz channel bandwidth. This results in higher spurious and out-of-band emissions due to transmit spectral re-growth noise at larger frequency offsets away from the transmission channel. Additionally, the cross-modulation effect, when simultaneous wideband transmission on NR is present with narrowband transmission on LTE, reaches further in the frequency domain due to the wider bandwidths of NR. Therefore, third order cross-modulation products are more likely to impact downlink receive bands, especially for those FDD bands with relatively narrow duplex distance. Furthermore, baseband spurious products, such as CIM3 or transmit DAC sampling images for example, extend further due to wider NR channel bandwidths available for transmission and, thus, are more likely to impact downlink receive bands when they might not have previously reached for LTE carrier aggregation. Receiver blocking is also a factor in such EN-DC configuration that can degrade sensitivity. The potential receiver blocking degradation in FDD band downlink is dependent on the FDD band receive filter rejection in the TDD band transmit frequency range.