diff --git a/flash/FP3/flash_FP3_factory.sh b/flash/FP3/flash_FP3_factory.sh
index 566cedcd39c1350b035d74861d8eae70197ecedc..2a601ae3c546a92650d392c5953aae6313280672 100755
--- a/flash/FP3/flash_FP3_factory.sh
+++ b/flash/FP3/flash_FP3_factory.sh
@@ -89,21 +89,21 @@ find_device() {
 # Check if the device is properly unlocked
 check_unlock_status() {
   PHONE_IS_READY=true
-  if (fastboot getvar is-userspace 2>&1 | grep -q yes); then
+  if ("${FASTBOOT_BIN}" getvar is-userspace 2>&1 | grep -q yes); then
     echo "Info: Your phone is in fastbootD mode."
-    if (fastboot getvar unlocked 2>&1 | grep -q no); then
+    if ("${FASTBOOT_BIN}" getvar unlocked 2>&1 | grep -q no); then
       echo "Error: Your phone is still locked."
       echo "Did you execute 'fastboot flashing unlock'?"
       PHONE_IS_READY=false
     fi
   else
     echo "Info: Your phone is in regular bootloader mode."
-    if (fastboot getvar unlocked 2>&1 | grep -q no); then
+    if ("${FASTBOOT_BIN}" getvar unlocked 2>&1 | grep -q no); then
       echo "Error: Your phone is still locked."
       echo "Did you execute 'fastboot flashing unlock'?"
       PHONE_IS_READY=false
     fi
-    if (fastboot oem device-info 2>&1 | grep -q "critical unlocked: false"); then
+    if ("${FASTBOOT_BIN}" oem device-info 2>&1 | grep -q "critical unlocked: false"); then
       echo "Error: Critical partitions are still locked."
       echo "Did you execute 'fastboot flashing unlock_critical'?"
       PHONE_IS_READY=false
diff --git a/flash/FP4/flash_FP4_factory.sh b/flash/FP4/flash_FP4_factory.sh
index 608b770aac08ccae726035b0e5e0396514497b56..3078fc6a8b5939536c111c86e587833da1fd5564 100755
--- a/flash/FP4/flash_FP4_factory.sh
+++ b/flash/FP4/flash_FP4_factory.sh
@@ -84,21 +84,21 @@ find_device() {
 # Check if the device is properly unlocked
 check_unlock_status() {
   PHONE_IS_READY=true
-  if (fastboot getvar is-userspace 2>&1 | grep -q yes); then
+  if ("${FASTBOOT_BIN}" getvar is-userspace 2>&1 | grep -q yes); then
     echo "Info: Your phone is in fastbootD mode."
-    if (fastboot getvar unlocked 2>&1 | grep -q no); then
+    if ("${FASTBOOT_BIN}" getvar unlocked 2>&1 | grep -q no); then
       echo "Error: Your phone is still locked."
       echo "Did you execute 'fastboot flashing unlock'?"
       PHONE_IS_READY=false
     fi
   else
     echo "Info: Your phone is in regular bootloader mode."
-    if (fastboot getvar unlocked 2>&1 | grep -q no); then
+    if ("${FASTBOOT_BIN}" getvar unlocked 2>&1 | grep -q no); then
       echo "Error: Your phone is still locked."
       echo "Did you execute 'fastboot flashing unlock'?"
       PHONE_IS_READY=false
     fi
-    if (fastboot oem device-info 2>&1 | grep -q "critical unlocked: false"); then
+    if ("${FASTBOOT_BIN}" oem device-info 2>&1 | grep -q "critical unlocked: false"); then
       echo "Error: Critical partitions are still locked."
       echo "Did you execute 'fastboot flashing unlock_critical'?"
       PHONE_IS_READY=false
diff --git a/flash/FP5/flash_FP5_factory.sh b/flash/FP5/flash_FP5_factory.sh
index 122086077ff0efe1982d2a191abdd0e9753b2719..1a28d82377cf4c3d98e7c3ed8aa4edce6ea6f2de 100755
--- a/flash/FP5/flash_FP5_factory.sh
+++ b/flash/FP5/flash_FP5_factory.sh
@@ -84,21 +84,21 @@ find_device() {
 # Check if the device is properly unlocked
 check_unlock_status() {
   PHONE_IS_READY=true
-  if (fastboot getvar is-userspace 2>&1 | grep -q yes); then
+  if ("${FASTBOOT_BIN}" getvar is-userspace 2>&1 | grep -q yes); then
     echo "Info: Your phone is in fastbootD mode."
-    if (fastboot getvar unlocked 2>&1 | grep -q no); then
+    if ("${FASTBOOT_BIN}" getvar unlocked 2>&1 | grep -q no); then
       echo "Error: Your phone is still locked."
       echo "Did you execute 'fastboot flashing unlock'?"
       PHONE_IS_READY=false
     fi
   else
     echo "Info: Your phone is in regular bootloader mode."
-    if (fastboot getvar unlocked 2>&1 | grep -q no); then
+    if ("${FASTBOOT_BIN}" getvar unlocked 2>&1 | grep -q no); then
       echo "Error: Your phone is still locked."
       echo "Did you execute 'fastboot flashing unlock'?"
       PHONE_IS_READY=false
     fi
-    if (fastboot oem device-info 2>&1 | grep -q "critical unlocked: false"); then
+    if ("${FASTBOOT_BIN}" oem device-info 2>&1 | grep -q "critical unlocked: false"); then
       echo "Error: Critical partitions are still locked."
       echo "Did you execute 'fastboot flashing unlock_critical'?"
       PHONE_IS_READY=false