diff --git a/src/Modem.cpp b/src/Modem.cpp
index 7934e3a..63cb224 100644
--- a/src/Modem.cpp
+++ b/src/Modem.cpp
@@ -61,11 +61,6 @@ int ModemClass::begin(bool restart)
   // datasheet warns not to use _resetPin, this may lead to an unrecoverable state
   digitalWrite(_resetPin, LOW);
 
-  if (restart) {
-    shutdown();
-    end();
-  }
-
   _uart->begin(_baud > 115200 ? 115200 : _baud);
 
   // power on module
@@ -80,6 +75,14 @@ int ModemClass::begin(bool restart)
     }
   }
 
+  if (restart) {
+    shutdown();
+    end();
+    delay(1500);
+    setVIntPin(SARA_VINT_OFF);
+    begin(false);
+  }
+
   if (!autosense()) {
     return 0;
   }
diff --git a/src/NB.h b/src/NB.h
index 742e356..c05ac8d 100644
--- a/src/NB.h
+++ b/src/NB.h
@@ -45,9 +45,9 @@ class NB {
                          to call repeatedly ready() until you get a result. Default is TRUE.
       @return If synchronous, NB_NetworkStatus_t. If asynchronous, returns 0.
     */
-  NB_NetworkStatus_t begin(const char* pin = 0, bool restart = true, bool synchronous = true);
-  NB_NetworkStatus_t begin(const char* pin, const char* apn, bool restart = true, bool synchronous = true);
-  NB_NetworkStatus_t begin(const char* pin, const char* apn, const char* username, const char* password, bool restart = true, bool synchronous = true);
+  NB_NetworkStatus_t begin(const char* pin = 0, bool restart = false, bool synchronous = true);
+  NB_NetworkStatus_t begin(const char* pin, const char* apn, bool restart = false, bool synchronous = true);
+  NB_NetworkStatus_t begin(const char* pin, const char* apn, const char* username, const char* password, bool restart = false, bool synchronous = true);
 
   /** Check network access status
       @return 1 if Alive, 0 if down