AVR Freaks

Hey all i am wondering what is wrong with my code below. I have 2 issues.

First issue I am checking if c equals "hi" and if it does then display said hi. I currently see the output of c when it hits the Serial.println(c); but never see the said hi even though Serial.println(c); does say "said hi".

Second issue is that when i startup the arduino i am sending the AT command AT using bluetooth.println("AT"); // just a check but all it seems to do is display AT on the phone instead of OK as it should.

#include <SoftwareSerial.h>

SoftwareSerial bluetooth(8,9); // RX, TX

void setup() {
  // Open serial communications and wait for port to open:
  Serial.begin(9600);
  while (!Serial) {
    ; // wait for serial port to connect. Needed for native USB port only
  }

  Serial.println("PC Side Connected");
  bluetooth.begin(9600);
  while (!bluetooth) {
    ; // wait for serial port to connect. Needed for native USB port only
  }

  bluetooth.println("Bluetooth Side Connected");
  bluetooth.println("AT"); // just a check
}

void loop() { // run over and over
  String c;

  if (bluetooth.available()) {
    //What is sent back from the BT module
    c = bluetooth.readStringUntil('\n');
    delay(10);
    Serial.println(c);

        if (c.equals('hi')) {
          Serial.println("said hi");
        }
  }

  if (Serial.available()) {
    //Send back data to Bluetooth module
    bluetooth.write(Serial.read());
  }
}