diff --git a/ios/RNCallKeep/RNCallKeep.m b/ios/RNCallKeep/RNCallKeep.m
index 786045fe..0044c4f7 100644
--- a/ios/RNCallKeep/RNCallKeep.m
+++ b/ios/RNCallKeep/RNCallKeep.m
@@ -935,11 +935,6 @@ - (void)configureAudioSession
 
     [audioSession setMode:mode error:nil];
 
-    double sampleRate = 44100.0;
-    [audioSession setPreferredSampleRate:sampleRate error:nil];
-
-    NSTimeInterval bufferDuration = .005;
-    [audioSession setPreferredIOBufferDuration:bufferDuration error:nil];
     [audioSession setActive:TRUE error:nil];
 }