diff --git a/Src/AtGsmTelitLe910_Ecall.c b/Src/AtGsmTelitLe910_Ecall.c
index bf5dc01..8575b58 100644
--- a/Src/AtGsmTelitLe910_Ecall.c
+++ b/Src/AtGsmTelitLe910_Ecall.c
@@ -42,18 +42,96 @@ AtCommandResult AtGsmTelitLe910_EcallSetModeBattle(tAtCmd *env) {
 
 AtCommandResult AtGsmTelitLe910_SIMCardDetect(tAtCmd *env) {
     AtCmdPrepare(env);
-
+    AtCmdRxClear(env);
     AtCmdSendStatic(env, "AT#SIMDET=1\r\n");
+    uint32_t timeout = SystemGetMs() + 4000;
 
-    return AtCmdOkErrAnswer(env, env->stdRxTimeout);
+    while ( (AtCmdReceiveNextLine(env, 500) == AT_OK) && (timeout > SystemGetMs()) ) {
+        if(AtCmdRxBeginWithStatic(env, "OK") == AT_OK){
+            AtCmdPrepare(env);
+            AtCmdRxClear(env);
+            SystemDelayMs(500);
+            AtCmdSendStatic(env, "AT#CIMI\r\n");
+            timeout = SystemGetMs() + 4000;
+            while ( (AtCmdReceiveNextLine(env, 500) == AT_OK) || (timeout > SystemGetMs()) ) {
+                if(AtCmdRxBeginWithStatic(env, "OK") == AT_OK){
+                    SystemDelayMs(1000);
+                    return AT_OK;
+                } else if(AtCmdRxBeginWithStatic(env, "+CME ERROR: SIM not inserted") == AT_OK){
+                    AtCmdPrepare(env);
+                    AtCmdRxClear(env);
+                    SystemDelayMs(500);
+                    AtCmdSendStatic(env, "AT#SIMDET=1\r\n");
+                    AtCmdPrepare(env);
+                    AtCmdRxClear(env);
+                    SystemDelayMs(500);
+                    AtCmdSendStatic(env, "AT#CIMI\r\n");
+                    continue;
+                }
+                if(timeout < SystemGetMs()){
+                    return AT_TIMEOUT;
+                }
+            }
+            if(timeout < SystemGetMs()){
+                return AT_TIMEOUT;
+            } else {
+                return AT_ERROR;
+            }
+        } else {
+            continue;
+        }
+    }
+    return AT_ERROR;
+
+///===================================================
+//
+//    AtCmdPrepare(env);
+//    AtCmdRxClear(env);
+//    AtCmdSendStatic(env, "AT#SIMDET=1\r\n");
+//
+//    uint32_t timeout = SystemGetMs() + 4000;
+//
+//    while ( (AtCmdReceiveNextLine(env, 500) == AT_OK) && (timeout > SystemGetMs()) ) {
+//        if (AtCmdRxBeginWithStatic(env, "")) {
+//            if (AtCmdRxBeginWithStatic(env, "OK")) {
+//                AtCmdPrepare(env);
+//                AtCmdRxClear(env);
+//                SystemDelayMs(500);
+//                AtCmdSendStatic(env, "AT#CIMI\r\n");
+//                timeout = SystemGetMs() + 4000;
+//
+//                while ((AtCmdReceiveNextLine(env, 500) == AT_OK) && (timeout > SystemGetMs())) {
+//                    if (AtCmdRxBeginWithStatic(env, "#CIMI: ")) {
+//                        SystemDelayMs(1000);
+//                        return AT_OK;
+//                    } else if (AtCmdRxBeginWithStatic(env, "+CME ERROR: SIM not inserted")) {
+//                        AtCmdPrepare(env);
+//                        AtCmdRxClear(env);
+//                        SystemDelayMs(500);
+//                        AtCmdSendStatic(env, "AT#CIMI\r\n");
+//                        continue;
+//                    }
+//                }
+//            } else {
+//                AtCmdPrepare(env);
+//                AtCmdRxClear(env);
+//                SystemDelayMs(500);
+//                AtCmdSendStatic(env, "AT#SIMDET=1\r\n");
+//                continue;
+//            }
+//        }
+//    }
+//
+//    return AT_ERROR;
 }
 
 AtCommandResult AtGsmTelitLe910_SIMCardNoDetect(tAtCmd *env) {
     AtCmdPrepare(env);
-
+    AtCmdRxClear(env);
     AtCmdSendStatic(env, "AT#SIMDET=0\r\n");
-
-    return AtCmdOkErrAnswer(env, env->stdRxTimeout);
+    AtCommandResult res = AtCmdOkErrAnswer(env, env->stdRxTimeout);
+    SystemDelayMs(500);
+    return res;
 }
 
 AtCommandResult AtGsmTelitLe910_EcallWriteMsdToModem(tAtCmd *env, uint8_t *msd, size_t msdLength) {