diff --git a/gsmmodem/modem.py b/gsmmodem/modem.py
index e468f34..f99e37b 100644
--- a/gsmmodem/modem.py
+++ b/gsmmodem/modem.py
@@ -378,7 +378,9 @@ def _unlockSim(self, pin):
             else:
                 # Nothing read (real timeout)
                 raise timeout
-        if cpinResponse != '+CPIN: READY':
+        #if cpinResponse != '+CPIN: READY':
+        #some modems reply w/o blanks in response
+        if cpinResponse.replace(' ', '') != '+CPIN:READY':
             if pin != None:
                 self.write('AT+CPIN="{0}"'.format(pin))
             else: