diff --git a/src/Ftp.h b/src/Ftp.h
index e63031d..bbc29fd 100644
--- a/src/Ftp.h
+++ b/src/Ftp.h
@@ -31,6 +31,7 @@
 #include "Sim800.h"
 #include "Result.h"
 
+
 class FTP : public SIM800
 {
 
diff --git a/src/GPRS.cpp b/src/GPRS.cpp
index b5416f9..d25b603 100644
--- a/src/GPRS.cpp
+++ b/src/GPRS.cpp
@@ -52,12 +52,12 @@ Result openGPRSContext(SIM800 *sim800, const char *apn)
 
   sim800->sendATTest();
 
-  while ((sim800->sendCmdAndWaitForResp_P(REGISTRATION_STATUS, CONNECTED, 2000) != TRUE &&
-          sim800->sendCmdAndWaitForResp_P(REGISTRATION_STATUS, ROAMING, 2000) != TRUE) &&
+  while ((sim800->sendCmdAndWaitForResp_P(REGISTRATION_STATUS, CONNECTED, 12000) != TRUE &&
+          sim800->sendCmdAndWaitForResp_P(REGISTRATION_STATUS, ROAMING, 12000) != TRUE) &&
          attempts < MAX_ATTEMPTS)
   {
-    sim800->sendCmdAndWaitForResp_P(READ_VOLTAGE, AT_OK, 1000);
-    sim800->sendCmdAndWaitForResp_P(SIGNAL_QUALITY, AT_OK, 1000);
+    sim800->sendCmdAndWaitForResp_P(READ_VOLTAGE, AT_OK, 2000);
+    sim800->sendCmdAndWaitForResp_P(SIGNAL_QUALITY, AT_OK, 2000);
     attempts++;
     delay(1000 * attempts);
     if (attempts == MAX_ATTEMPTS)
@@ -67,20 +67,20 @@ Result openGPRSContext(SIM800 *sim800, const char *apn)
     }
   }
 
-  if (sim800->sendCmdAndWaitForResp_P(BEARER_PROFILE_GPRS, AT_OK, 2000) == FALSE)
+  if (sim800->sendCmdAndWaitForResp_P(BEARER_PROFILE_GPRS, AT_OK, 14000) == FALSE)
     result = ERROR_BEARER_PROFILE_GPRS;
 
   char httpApn[64];
   char tmp[24];
   strcpy_P(tmp, apn);
   sprintf_P(httpApn, BEARER_PROFILE_APN, tmp);
-  if (sim800->sendCmdAndWaitForResp(httpApn, AT_OK_, 2000) == FALSE)
+  if (sim800->sendCmdAndWaitForResp(httpApn, AT_OK_, 10000) == FALSE)
     result = ERROR_BEARER_PROFILE_APN;
 
-  while (sim800->sendCmdAndWaitForResp_P(QUERY_BEARER, BEARER_OPEN, 2000) == FALSE && attempts < MAX_ATTEMPTS)
+  while (sim800->sendCmdAndWaitForResp_P(QUERY_BEARER, BEARER_OPEN, 10000) == FALSE && attempts < MAX_ATTEMPTS)
   {
     attempts++;
-    if (sim800->sendCmdAndWaitForResp_P(OPEN_GPRS_CONTEXT, AT_OK, 2000) == FALSE)
+    if (sim800->sendCmdAndWaitForResp_P(OPEN_GPRS_CONTEXT, AT_OK, 10000) == FALSE)
     {
       result = ERROR_OPEN_GPRS_CONTEXT;
     }
@@ -97,7 +97,7 @@ Result closeGPRSContext(SIM800 *sim800)
 {
   Result result = SUCCESS;
 
-  if (sim800->sendCmdAndWaitForResp_P(CLOSE_GPRS_CONTEXT, AT_OK, 2000) == FALSE)
+  if (sim800->sendCmdAndWaitForResp_P(CLOSE_GPRS_CONTEXT, AT_OK, 4000) == FALSE)
     result = ERROR_CLOSE_GPRS_CONTEXT;
 
   return result;
diff --git a/src/Http.cpp b/src/Http.cpp
index 43fc25d..53fcf54 100644
--- a/src/Http.cpp
+++ b/src/Http.cpp
@@ -55,7 +55,7 @@ Result HTTP::connect(const char *apn)
 {
   Result result = openGPRSContext(this, apn);
 
-  if (sendCmdAndWaitForResp_P(HTTP_INIT, AT_OK, 2000) == FALSE)
+  if (sendCmdAndWaitForResp_P(HTTP_INIT, AT_OK, 8000) == FALSE)
     result = ERROR_HTTP_INIT;
 
   return result;
@@ -65,7 +65,7 @@ Result HTTP::disconnect()
 {
   Result result = closeGPRSContext(this);
 
-  if (sendCmdAndWaitForResp_P(HTTP_CLOSE, AT_OK, 2000) == FALSE)
+  if (sendCmdAndWaitForResp_P(HTTP_CLOSE, AT_OK, 5000) == FALSE)
     result = ERROR_HTTP_CLOSE;
 
   return result;
@@ -83,7 +83,7 @@ Result HTTP::post(const char *uri, const char *body, char *response)
   sprintf_P(buffer, HTTP_DATA, strlen(body), delayToDownload);
   strcpy_P(resp, DOWNLOAD);
   
-  sendCmdAndWaitForResp(buffer, resp, 2000);
+  sendCmdAndWaitForResp(buffer, resp, 7000);
 
   purgeSerial();
   sendCmd(body);
@@ -108,7 +108,7 @@ Result HTTP::get(const char *uri, char *response)
   Result result;
   setHTTPSession(uri);
 
-  if (sendCmdAndWaitForResp_P(HTTP_GET, HTTP_2XX, 2000) == TRUE)
+  if (sendCmdAndWaitForResp_P(HTTP_GET, HTTP_2XX, 7000) == TRUE)
   {
     char buffer[16];
     strcpy_P(buffer, HTTP_READ);
diff --git a/src/Sim800.cpp b/src/Sim800.cpp
index ab2ac14..dd7d0e9 100644
--- a/src/Sim800.cpp
+++ b/src/Sim800.cpp
@@ -203,11 +203,11 @@ void SIM800::sleep(bool force)
 {
     if (force)
     {
-        sendCmdAndWaitForResp_P(SLEEP_MODE_1, AT_OK, 2000);
+        sendCmdAndWaitForResp_P(SLEEP_MODE_1, AT_OK, 4000);
     }
     else
     {
-        sendCmdAndWaitForResp_P(SLEEP_MODE_2, AT_OK, 2000);
+        sendCmdAndWaitForResp_P(SLEEP_MODE_2, AT_OK, 4000);
     }
 }
 
diff --git a/src/Sim800.h b/src/Sim800.h
index f699526..0dbf2f8 100644
--- a/src/Sim800.h
+++ b/src/Sim800.h
@@ -143,4 +143,4 @@ class SIM800
     unsigned int resetPin;
 };
 
-#endif
\ No newline at end of file
+#endif