GET command with GPRS GSM A6 and arduino

I'm trying to get data from a text file(read.txt) in server by sending a HTTP GET request via AT commands for the GPRS GSM. Here is my code:

void setup()
{   
     Serial.begin(115200);
     delay(500);

    Serial.println("AT+CIPSHUT");     delay(1000);     printSerialData();

    Serial.println("AT+CIPMUX=0");     delay(1000);     printSerialData();

    Serial.println("AT+CGATT=1");     delay(1000);     printSerialData();

    Serial.println("AT+CSTT=\"internet\",\"\",\"\"");     delay(1000);     printSerialData();

    Serial.println("AT+CIICR");     delay(1000);     printSerialData();

    Serial.println("AT+CIFSR");     delay(1000);     printSerialData();

    Serial.println("AT+CIPSTART=\"TCP\",\"xxx.xxx.xxx.xxx\", 80");     delay(1000);     printSerialData();

    Serial.println("AT+CIPSEND");     delay(1000);     printSerialData();

    Serial.println("GET /data/read.txt HTTP/1.1");     delay(1000);     printSerialData();

    Serial.println("Host: xxx.xxx.xxx.xxx\r\n");     delay(1000);     printSerialData();

    Serial.write(0x1A);     delay(10000);     printSerialData(); }

Here's the serial monitor's output.

AT+CIPSHUT

+CME ERROR:50
AT+CIPMUX=0

OK
AT+CGATT=1

OK
AT+CIPMUX=0

OK
AT+CGATT=1

OK
AT+CSTT="internet","",""

OK
AT+CIICR

OK
AT+CIFSR

10.114.139.110

OK
AT+CIPSTART="TCP","xxx.xxx.xxx.xxx", 80

CONNECT OK

OK
AT+CIPSEND

> GET http://xxx.xxx.xxx.xxx/data/read.txt HTTP/1.1
Host: xxx.xxx.xxx.xxx


OK

+CIPRCV:241,HTTP/1.1 200 OK
Date: Tue, 13 Feb 2018 13
OK

So, after date is shown, I get nothing. The data in text file is not printed. Why is that? I want the data in text file to be printed here.

Read to understand HTTP https://www.ntu.edu.sg/home/ehchua/programming/webprogramming/HTTP_Basics.html

Exactly the same problem with Ai_Thinker A9G (V02.02.20180825R);

Using AT+GETHTTP command to send/receive data from my php server, receiving only a part of response header with 200 code but can not get body of server response. Tried with different url's but always the same.

AT+HTTPGET="http://xxxxx.com/iot/api.php?sensor=100"

OK HTTP/1.1 200 OK Server: nginx/1.16.0 Date: Wed, 08 Ja

How can I get response body?