Duplexer For Samsung F400

The Duplexer for your Samsung F400 is the RF filter component on the motherboard that enables simultaneous transmission and reception on the same antenna by separating the TX and RX signal paths by frequency. It is required when the component has been damaged by ESD, liquid, or physical impact on your Samsung F400.

Yes — provided no other RF components are damaged, this precision replacement will restore correct TX/RX signal separation and RF performance to factory standard on your Samsung F400 after professional board-level installation.

Not necessarily — poor call quality can also be caused by network conditions, a damaged microphone or earpiece, or a faulty audio codec. Systematic RF and audio path diagnosis is required before concluding the duplexer is at fault. If board-level RF testing confirms duplexer degradation, the replacement is the correct solution for your Samsung F400.

It is an advanced board-level repair requiring micro-soldering skills and RF component handling experience. The old component must be carefully reflowed and removed, the pad cleaned, and the new component precisely placed and soldered. Professional board-level repair is essential for your Samsung F400.

Yes — a 7-day replacement warranty covering manufacturing defects is included. An unboxing video is mandatory for all warranty claims. Components with physical damage or that have been installed are not eligible for return. For more information, check out SAHII's Return Policy.