retore the contact list

main.py

@@ -66,7 +66,7 @@ def create_modem_for_port(port: str) -> SerialModem:
     # Uncomment the following line to see what the modem is doing:
     init_logger()
     modem = GsmModem(port)
-    modem.connect('0000')
+    modem.connect()
     number = modem.ownNumber
     logger.info("The SIM card phone number is:")
     logger.info(number)
@@ -178,7 +178,7 @@ def read_all_the_phone_number():
 
 def start_book():
     slot_number = 1
-    slot_sum = 32
+    slot_sum = 2
     for i in range(slot_number, slot_sum + 1):
         card_pool.reset()
         print("will switch to " + str(i))