In the present 3G and 4G systems, main frequency bands are employing frequency division duplexing (FDD) system. Generally, RF front-ends for FDD system in cellular handsets consist of SAW/BAW duplexers, power amplifiers (PAs), antenna switches and some matching components. With the expand of operating frequency bands, those devices and components have been increasing in number and the complicated wiring arrangements between RF devices and transceiver IC ports make the circuit design harder work. A reconfigurable circuit structure and/or tunable devices are one of the solution against these issues (2). A number of approaches to simplify the RF front-end have been studied using tunable devices (3, 4). However, sufficient solutions to meet the 3GPP specifications could not be founded at the moment. The new tunable RF front-end solution (5) which is the SAW based single chain tunable RF front-ends (6) for three paths each (low bands, medium bands and high bands), using wideband circulators (7) , tunable filters and tunable LNPA was proposed as shown in Fig.1. This paper focuses on LNPA and shows a principle of the reducing RX-band noise in LNPA. A Low RX noise PA for the purpose of improvement of RX sensiticity in the cell edge was reported in the middle band (8). However, in the low band case, the closest frequency band gap between TX and RX is 30MHz, hence LNPA adopts SAW based interstage filters to reduce RX band noise in narrower frequency gap.