gsm – Turning LED On/Off by using SIM808 with Arduino Mega

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I am trying to turn an LED on/off by using GSM 808 module. Here #a0 = LED off and #a1 = LED on. I have used lcdShow function to display characters in LCD display. But nothing appears on display. What is wrong in this code?

#include <SoftwareSerial.h>
#include <Wire.h>
#include <LCD.h>
#include <LiquidCrystal_I2C.h>
//I2C pins declaration
LiquidCrystal_I2C lcd (0x3F, 2, 1, 0, 4, 5, 6, 7, 3, POSITIVE);
SoftwareSerial SIM808 (10, 11);
char inchar;
const int LED = 2;

void setup ()
{

    Serial.begin (9600);
    SIM808.begin (9600);
    delay (10000);
    SIM808.print ("AT+CMGF=1r");
    delay (100);
    SIM808.print ("AT+CNMI = 2,2,0,0,0r");
    delay (100);

    lcd.begin (16, 2);
    lcd.backlight ();

    delay (1000);

    pinMode (LED, OUTPUT);
    digitalWrite (LED, HIGH);
}

void loop ()
{
    if (SIM808.available () > 0)
    {
        inchar = SIM808.read ();
        if (inchar == '#')
        {
            lcdShow (inchar);
            delay (10);
            inchar = SIM808.read ();
            if (inchar == 'a')
            {
                lcdShow (inchar);
                delay (10);
                inchar = SIM808.read ();
                if (inchar == '0')
                {
                    lcdShow (inchar);
                    digitalWrite (LED, LOW);
                }
                else if (inchar == '1')
                {
                    lcdShow (inchar);
                    digitalWrite (LED, HIGH);
                }
            }
        }
        SIM808.println ("AT+CMGD = 1,4");
    }

}

void lcdShow (char i)
{
    lcd.setCursor (0, 0);
    lcd.print (i);
    delay (5000);

}

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