When I was on call andi put in specker mode my mic is not working.

I’m sorry to hear that your Samsung Galaxy S9 microphone is not working when you put it in speaker mode. This could be a hardware or software issue, depending on the cause of the problem. Here are some possible solutions you can try:

• Force restart your device. This may clear any temporary bugs that affect the microphone function. To do this, press and hold the Power and Volume Down buttons for about 10 seconds or until the device power cycles. Then, select Normal Boot from the Maintenance Boot Mode screen¹.
• Wipe the cache partition. This may fix any corrupted system cache that may interfere with the microphone function. To do this, turn off your device and press and hold the Power, Bixby, and Volume Up buttons until you see the Android logo. Then, use the Volume Down button to highlight wipe cache partition and press the Power button to select it. Confirm by selecting yes and wait for the process to finish. Then, select reboot system now².
• Check for any obstructions to your microphone or speaker. Make sure there is no dust, dirt, or debris blocking the sound input or output. You can use a soft brush or a compressed air can to gently clean them³.
• Update the microphone driver. This may fix any compatibility or performance issues with the microphone function. To do this, swipe down at the top and tap on the settings icon. Then, go to developer options and scroll down to media. Tap on disable usb audio routing and switch it off. Then, go to device manager and expand human interface devices. Locate the touch screen driver and right-click on it. Click on update driver software and follow the instructions⁴.
• Calibrate the touch screen. This may improve the accuracy and responsiveness of the touch screen function. To do this, type and search [Calibrate the screen for pen or touch input] in the Windows search bar, then click [Open]. Select [Reset], then click [OK]. The touch calibration has been reset to the default settings, please restart the computer and test the touch screen function again⁵.
• Replace the charging flex cable. This may fix any loose or faulty connections between the microphone and the motherboard. To do this, you need to open your device and remove the old cable and install a new one. You can buy a replacement cable online from this link: Samsung Galaxy S9 Charging Flex Cable. You also need some tools such as a T3 Torx screwdriver, an opening pick, a spudger, and a tweezers. You can find them here: iFixit Pro Tech Toolkit. You can follow this video for a visual guide on how to replace the charging flex cable: Samsung Galaxy S9 mic not working change charging flex.

I hope this helps you fix your microphone problem. If you have any other questions, please let me know. 😊