diff --git a/src/configs.sh b/src/configs.sh
index f127ae3..9f7cceb 100644
--- a/src/configs.sh
+++ b/src/configs.sh
@@ -3,4 +3,4 @@
 INTERVAL=60 # Seconds, Interval between two connection check of internet
 DOUBLE_CHECK_WAIT=10    # Seconds, wait time for double check when the connection is down
 PING_TIMEOUT=9  # Seconds, Timeout of ping command          
-NETWORK_CHECK_TIMEOUT=300   # Count, Check network for ($NETWORK_TIMEOUT x 2 Seconds) 
\ No newline at end of file
+NETWORK_CHECK_TIMEOUT=150   # Count, Check network for ($NETWORK_TIMEOUT x 2 Seconds)
\ No newline at end of file
diff --git a/src/configure_modem.sh b/src/configure_modem.sh
index 3975f81..3d3b251 100644
--- a/src/configure_modem.sh
+++ b/src/configure_modem.sh
@@ -52,7 +52,7 @@ else
 fi
 
 ### Modem configuration for RMNET/PPP mode ##################################
-debug "Checking APN and Modem Mode..."
+debug "Checking APN and Modem Modem..."
 
 # APN Configuration
 # -----------------
@@ -177,5 +177,5 @@ fi
 
 # Check the network is ready
 # --------------------------
-if check_network -eq 0; then exit 0; else debug "Network registeration is failed!"; exit 1; fi
+if check_network -eq 0; then exit 0; else debug "Network registeration is failed!. Modem configuration is unsuccesfully ended!"; exit 1; fi
 
diff --git a/src/functions.sh b/src/functions.sh
index 8f4c418..035f191 100644
--- a/src/functions.sh
+++ b/src/functions.sh
@@ -21,7 +21,7 @@ function check_network()
     # Check the network is ready
     debug "Checking the network is ready..."
 
-    for i in {1..$NETWORK_CHECK_TIMEOUT}; do
+    for n in $(seq 1 $NETWORK_CHECK_TIMEOUT); do
         NETWORK_OK=0
 
         debug "SIM Status: " "-n" # no line break
@@ -32,17 +32,18 @@ function check_network()
 
 
         debug "Network Registeration Status: " "-n" # no line break
+        NR_TEXT=`atcom AT+CREG? | grep "CREG:"`
+        echo $NR_TEXT
+
         # For super SIM
-        atcom AT+CREG? | grep "CREG: 0,5" > /dev/null
+        echo $NR_TEXT | grep "CREG: 0,5" > /dev/null
         NETWORK_REG=$?
         # For native SIM
-        atcom AT+CREG? | grep "CREG: 0,1" > /dev/null
+        echo $NR_TEXT | grep "CREG: 0,1" > /dev/null
         NETWORK_REG_2=$?
         # Combined network registeration status
         NETWORK_REG=$((NETWORK_REG+NETWORK_REG_2))
 
-        if [[ $NETWORK_REG -ne 0 ]] || [[ $NETWORK_REG_2 -ne 0 ]]; then  atcom AT+CREG? | grep "CREG:"; fi
-
         if [[ $SIM_READY -eq 0 ]] && [[ $NETWORK_REG -le 1 ]]; then
             debug "Network is ready."
             NETWORK_OK=1
@@ -53,6 +54,6 @@ function check_network()
         fi
         sleep 2
     done
-    debug "Retwork registeration is failed! Please check SIM card, data plan, antennas etc."
+    debug "Network registeration is failed! Please check SIM card, data plan, antennas etc."
     return 1
 }
diff --git a/src/ppp_connection_manager.sh b/src/ppp_connection_manager.sh
index 80d05af..43fa8bb 100644
--- a/src/ppp_connection_manager.sh
+++ b/src/ppp_connection_manager.sh
@@ -12,14 +12,13 @@ else
     debug "Log folder is created."
 fi
 
-for i in {1..120}; do
+for i in {1..4}; do
     bash configure_modem.sh |& sudo tee -a ./logs/$LOG_FILE_NAME.log
-    MODEM_CONFIG=$?
+    MODEM_CONFIG=${PIPESTATUS[0]}   # compatible with only bash
 
     if [[ $MODEM_CONFIG -eq 0 ]]; then
         break
     fi
-
     sleep 1
 done
 
@@ -27,6 +26,6 @@ if [[ $MODEM_CONFIG -eq 0 ]]; then
     bash ppp_reconnect.sh |& sudo tee -a ./logs/$LOG_FILE_NAME.log
 else
     debug "Modem configuration is failed multiple times!" 
-    debug "Checkout other troubleshooting step on docs.sixfab.com."
+    debug "Checkout other troubleshooting steps on docs.sixfab.com."
     exit 1
 fi