Receiving sms with GSM modem and Pic16f887

char incchar;
char incoming[80];
char *result;              // command string search result
int i = 0;

void main() {
     PORTB = 0;
     TRISB = 0;              //RB0 input for interrupt
     PORTD = 0;
     TRISD = 0;                 //PORTD all output
     ANCON0 = 0x00;       // Configure PORTC pins as digital
     ANCON1 = 0x00;       // Configure PORTC pins as digital
     ANCON2 = 0x00;       // Configure PORTC pins as digital

  UART1_Init(9600);               // Initialize UART module at 9600 bps
  Delay_ms(100);                  // Wait for UART module to stabilize
  Delay_ms(2000);
  UART1_Write_Text("ATE0\r\n");   // AT command for Echo OFF
  Delay_ms(1000);
  UART1_Write_Text("AT\r\n");       // test GSM Modem
  Delay_ms(1000);
  UART1_Write_Text("AT+CMGF = 1\r\n");  //convert Sim900 module to text mode
  Delay_ms(1000);
  UART1_Write_Text("AT+CNMI=1,2,0,0,0\r\n"); // setup receiving (now important at this stage)
  Delay_ms(1000);
 

while (1) {                     // Endless loop
    if (UART1_Data_Ready()) {     // If data is received,
    for (i= 0; i < 80; i++)   {
      incchar = UART1_Read();     // read the received data,
      incoming[i]  = incchar;
      }
    if (result = strstr (incoming, "ON"));          // search for string "ON" in incoming and save it in result
    if (memcmp("ON", result, 2) == 0)
    
               {
                         PORTB.F0 = 0x01;

                         PORTB.F1 =0x01;
               }
    if (result = strstr (incoming, "OFF"));          // search for string "OFF" in incoming and save it in result
    if (memcmp("OFF", result, 3) == 0)
             {
                         PORTB.F0 =0x00;
                         PORTB.F1 =0x00;
              }

    }
    }
    }