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Reparatur- und Demontageanleitungen für Samsungs Flaggschiff-Android-Smartphone S21 Ultra, das im Januar 2021 veröffentlicht wurde.

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Primary Microphone not working and SIM detection fails sometimes.


One month ago I dropped my phone in pool and I took it to the service center where they have dried out the phone. Everything was working fine but later only I was able to find out that the primary microphone is not working and also sim doesn't get detect. So couple of times I did resetting the phone pressing the volume down and power button and that fixed the SIM related issue. After couple of weeks again there was an error saying SIM can't be detected and I tried the same solution , after several attempts it detected again. Then again after two days the issue pops up once again. So I was able to find out that primary microphone and SIM card slot is in the same daughter board and thought of replacing it by myself. I got the new board and replaced it yesterday and still my microphone is not working. What would be the solution ? Is there anything I need to check/replace further like flex cables and all ? Please advise. Appreciate your help.


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When it comes to liquid damage, you really can't repair it entirely. No matter how thorough you are, there will always be remaining damage that won't show up until later down the line.

Even in my shop I tell customers while I can sometimes repair liquid damage, there is absolutely NO GUARANTEE AND OR WARRANTY on the parts and labor. So if it dies the second they walk out the door, that's their problem unfortunately. Any repair shop would go out of business if they offered warranties on liquid damage repairs.

At this point, you might be better off replacing the device as you'll more than likely throw more money into fixing this one than buying a replacement.

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Thank you Jesse for your reply. I am going for a replacement.


Jesse, first common sense answer I've seen in a while. Nice one. 👍


@strongbow thanks!


my primary micropuhone does not work after rebuild -- everything else checks out on Samsung diagnostics.


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Rahul Manayath wird auf ewig dankbar sein.

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