Baudrate problem

I bought a UHF RFID reader module(um202) which is support RS232 and the initial baud rate is 115200. But I try much time with my Arduino UNO and it all not works.
It is because of the maximum baud rate of Rx in UN0 is 57600, so it cannot receive the response?

#include <SoftwareSerial.h>

SoftwareSerial mySerial(5,6);
unsigned char incomingByte;

void sendIdentifyCmd ()
{
byte cmd = {0xA5, 0x5A, 0x00, 0x08, 0x00, 0x08, 0x0D, 0x0A};
for(byte i =0;i<sizeof(cmd);i++)(mySerial.write(cmd*));*
_ for(byte i =0;i<sizeof(cmd);i++)(Serial.print(cmd*));_
_
}_
void setup ()
_
{_
_
Serial.begin (57600);_
_
mySerial.begin (115200);_
_
Serial.println (“begin initial Serial!\n”);_
_
}_
void loop ()
_
{_
_
sendIdentifyCmd ();_
_
while(mySerial.available()>0)_
_
{_
_
char incomingByte=mySerial.read ();_
_
Serial.print(incomingByte,HEX);_
_
Serial.print(“done”);_
_
}_
_
Serial.println(“sent”);_
_
delay(1000);_
_
}*_

SoftwareSerial library does not work at 115200
use 9600 or 19200

Should I change both of serial to 9600?

like this:

mySerial.begin(9600)
Serial.begin(9600)

Am I correct?

The built-in hardware serial port on the Arduino works at any speed.