The outgoing mic speaker is faulty.

Processor: Quad Core
Screen Size: 5.1 in
Memory Card Type: MicroSD
MPN: SM-G900F-BLACK, SMG900F
Model Number: samusng s5
Lock Status: Network Locked
SIM Card Slot: Single SIM
Colour: Black
Brand: Samsung
Network: Unlocked
Model: Samsung Galaxy S5
Connectivity: Quad-Band, Bluetooth, 4G, 3G, Wi-Fi, USB, GPS
Operating System: Android
Features: Camera, Colour Screen, Front Camera
Storage Capacity: 16 GB
Contract: Without Contract
Camera Resolution: 16.0 MP
RAM: 2 GB
EAN: 5055015278437