diff --git a/.idea/misc.xml b/.idea/misc.xml
index b96734e..e9a1859 100644
--- a/.idea/misc.xml
+++ b/.idea/misc.xml
@@ -1,4 +1,3 @@
-<?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
   <component name="ExternalStorageConfigurationManager" enabled="true" />
   <component name="NullableNotNullManager">
diff --git a/usbSerialForAndroid/build.gradle b/usbSerialForAndroid/build.gradle
index c2e6300..76b85fa 100644
--- a/usbSerialForAndroid/build.gradle
+++ b/usbSerialForAndroid/build.gradle
@@ -13,7 +13,7 @@ android {
         
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
         testInstrumentationRunnerArguments = [                    // Raspi   Windows   LinuxVM   ...
-                'rfc2217_server_host': '192.168.0.78',
+                'rfc2217_server_host': '192.168.0.124',
                 'rfc2217_server_nonstandard_baudrates': 'true',   // true    false     false
         ]
     }
diff --git a/usbSerialForAndroid/src/androidTest/java/com/hoho/android/usbserial/DeviceTest.java b/usbSerialForAndroid/src/androidTest/java/com/hoho/android/usbserial/DeviceTest.java
index bfb92c9..42165c7 100644
--- a/usbSerialForAndroid/src/androidTest/java/com/hoho/android/usbserial/DeviceTest.java
+++ b/usbSerialForAndroid/src/androidTest/java/com/hoho/android/usbserial/DeviceTest.java
@@ -362,9 +362,9 @@ public class DeviceTest {
         Assume.assumeTrue("only for Prolific", usb.serialDriver instanceof ProlificSerialDriver);
 
         int[] baudRates = {
-                75, 150, 300, 600, 1200, 1800, 2400, 3600, 4800, 7200, 9600, 14400, 19200,
-                28800, 38400, 57600, 115200, 128000, 134400, 161280, 201600, 230400, 268800,
-                403200, 460800, 614400, 806400, 921600, 1228800, 2457600, 3000000, /*6000000*/
+                75, 110, 150, 300, 600, 1200, 1800, 2400, 3600, 4800, 7200, 9600, 14400, 19200,
+                28800, 38400, 56000, 57600, 115200, 128000, 134400, 161280, 201600, 230400, 256000,
+                268800, 403200, 460800, 614400, 806400, 921600, 1228800, /* 2457600, 3000000, 6000000*/
         };
         usb.open();
         Assume.assumeFalse("only for non PL2303G*", ProlificSerialPortWrapper.isDeviceTypeHxn(usb.serialPort)); // HXN does not use divisor
@@ -396,28 +396,6 @@ public class DeviceTest {
 
             usb.setParameters(baudRate + 1, 8, 1, UsbSerialPort.PARITY_NONE);
             doReadWrite(String.valueOf(baudRate + 1), readWait);
-
-            // silent fallback to 9600 for unsupported baud rates
-            telnet.setParameters(9600, 8, 1, UsbSerialPort.PARITY_NONE);
-            usb.setParameters(baudRate + 1 + (1<<29), 8, 1, UsbSerialPort.PARITY_NONE);
-            doReadWrite(String.valueOf(baudRate + 1) + " + 1<<29", readWait);
-        }
-
-        // some PL2303... data sheets mention additional standard baud rates, others don't
-        // they do not work with my devices and linux driver also excludes them
-        baudRates = new int[]{110, 56000, 256000};
-        for(int baudRate : baudRates) {
-            int readWait = 500;
-            if(baudRate < 300) readWait = 1000;
-            if(baudRate < 150) readWait = 2000;
-            telnet.setParameters(baudRate, 8, 1, UsbSerialPort.PARITY_NONE);
-            usb.setParameters(baudRate, 8, 1, UsbSerialPort.PARITY_NONE);
-            doReadWrite(String.valueOf(baudRate), readWait);
-
-            // silent fallback to 9600 for unsupported baud rates
-            telnet.setParameters(9600, 8, 1, UsbSerialPort.PARITY_NONE);
-            usb.setParameters(baudRate + (1<<29), 8, 1, UsbSerialPort.PARITY_NONE);
-            doReadWrite(String.valueOf(baudRate) + " + 1<<29", readWait);
         }
     }
 
diff --git a/usbSerialForAndroid/src/main/java/com/hoho/android/usbserial/driver/ProlificSerialDriver.java b/usbSerialForAndroid/src/main/java/com/hoho/android/usbserial/driver/ProlificSerialDriver.java
index f4d438d..924f30b 100644
--- a/usbSerialForAndroid/src/main/java/com/hoho/android/usbserial/driver/ProlificSerialDriver.java
+++ b/usbSerialForAndroid/src/main/java/com/hoho/android/usbserial/driver/ProlificSerialDriver.java
@@ -30,9 +30,9 @@ public class ProlificSerialDriver implements UsbSerialDriver {
     private final String TAG = ProlificSerialDriver.class.getSimpleName();
 
     private final static int[] standardBaudRates = {
-            75, 150, 300, 600, 1200, 1800, 2400, 3600, 4800, 7200, 9600, 14400, 19200,
-            28800, 38400, 57600, 115200, 128000, 134400, 161280, 201600, 230400, 268800,
-            403200, 460800, 614400, 806400, 921600, 1228800, 2457600, 3000000, 6000000
+            75, 150, 300, 600, 1200, 1800, 2400, 3600, 4800, 7200, 9600,
+            14400, 19200, 28800, 38400, 57600, 115200, 230400, 460800,
+            614400, 921600, 1228800, 2457600, 3000000, 6000000
     };
     protected enum DeviceType { DEVICE_TYPE_01, DEVICE_TYPE_T, DEVICE_TYPE_HX, DEVICE_TYPE_HXN }
 
@@ -342,9 +342,6 @@ public class ProlificSerialDriver implements UsbSerialDriver {
         }
 
         private int filterBaudRate(int baudRate) {
-            if(BuildConfig.DEBUG && (baudRate & (3<<29)) == (1<<29)) {
-                return baudRate & ~(1<<29); // for testing purposes accept without further checks
-            }
             if (baudRate <= 0) {
                 throw new IllegalArgumentException("Invalid baud rate: " + baudRate);
             }