This is the Samsung GT-S5250 classic solution for earpiece speaker problem, if there is no voice can be heard during a call conversation. This may help to fix the problem if you already replace the speaker or confirmed that it is still working.
![samsung GT s5250 ear speaker ways - Samsung GT-S5250 Ear Speaker Problem Jumper]( "samsung GT s5250 ear speaker ways - Samsung GT-S5250 Ear Speaker Problem Jumper")
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If the speaker is okay, clean the speaker terminal contact pads on the PCB board. Check the filter coils and ESD protection diodes,.. clean, re-solder it or replace if found damaged.
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