callers can't hear me

[R0bS4m]

My Samsung s9 i started noticing the first or second call from people they can't hear me but I can hear them.  I've delete some apps and updated phone. 

[Mitzzz999]

the mic in your phone might be faulty or may need dust clearing out.

[R0bS4m]

ok even though it seems intermittently occurring? I'll have a look.

[Mitzzz999]

if there's nothing blocking the mic then
it could be a loose connection within the device. because it is a S9 it is probably outside the warranty time? if so you may have to pay to get it repaired or look at upgrade options.

[R0bS4m]

cheers appreciate your time replying. I'm going to use headphones to check if mic is blocked and take it from there.