diff --git a/README.md b/README.md
index 373e719..8833764 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
-# Ledgerblue - Python tools for Ledger Blue, Nano S and Nano X
+# Ledgerblue - Python tools for Ledger devices
 
-This package contains Python tools to communicate with Ledger Blue, Nano S and Nano X and manage applications life cycle.
+This package contains Python tools to communicate with Ledger devices and manage applications life cycle.
 
 ## Installation
 
@@ -14,7 +14,7 @@ pip install ledgerblue
 
 ## Supported devices
 
-At the moment these tools work for all Nano S, Nano S+, and Blue devices, but only for special Nano X developer units which are not available to the general public.
+At the moment these tools work for all ledger devices, but only for special Nano X developer units which are not available to the general public.
 The Recover scripts, will work with Nano X starting from a specific version.
 
 Please check [Ledger Developer Portal](https://developers.ledger.com/docs/nano-app/introduction/) to see how to debug your application on a Nano X simulator using [Speculos](https://github.com/LedgerHQ/speculos)
@@ -55,9 +55,10 @@ Use the following Target IDs (--targetId option) when running commands directly:
 
 | Device name      | Firmware Version                   | Target ID    |
 |------------------|------------------------------------|--------------|
+| `Flex`           | all                                | `0x33300004` |
+| `Stax`           | all                                | `0x33200004` |
 | `Nano S Plus`    | all                                | `0x33100004` |
-| `Nano X`         | < 2.2.1 (**developer units only**) | `0x33000004` |
-| `Nano X`         | \>=  2.2.1                         | `0x33000004` |
+| `Nano X`         | (**developer units only**)         | `0x33000004` |
 | `Nano S`         | <= 1.3.1                           | `0x31100002` |
 | `Nano S`         | 1.4.x                              | `0x31100003` |
 | `Nano S`         | \>= 1.5.x                          | `0x31100004` |
diff --git a/ledgerblue/comm.py b/ledgerblue/comm.py
index f9445a9..8fe7fcd 100644
--- a/ledgerblue/comm.py
+++ b/ledgerblue/comm.py
@@ -71,6 +71,26 @@
 	except ImportError:
 		PCSC = False
 
+def get_possible_error_cause(sw):
+    cause_map = {
+        0x6982: "Have you uninstalled the existing CA with resetCustomCA first?",
+        0x6985: "Condition of use not satisfied (denied by the user?)",
+        0x6a84: "Not enough space?",
+        0x6a85: "Not enough space?",
+        0x6a83: "Maybe this app requires a library to be installed first?",
+        0x6484: "Are you using the correct targetId?",
+        0x6d00: "Unexpected state of device: verify that the right application is opened?",
+        0x6e00: "Unexpected state of device: verify that the right application is opened?",
+        0x5515: "Did you unlock the device?",
+        0x6814: "Unexpected target device: verify that you are using the right device?",
+        0x511F: "The OS version on your device does not seem compatible with the SDK version used to build the app",
+        0x5120: "Sideload is not supported on Nano X",
+    }
+
+    # If the status word is in the map, return the corresponding cause, otherwise return a default message
+    return cause_map.get(sw, "Unknown reason")
+
+
 class HIDDongleHIDAPI(Dongle, DongleWait):
 
 	def __init__(self, device, ledger=False, debug=False):
@@ -139,21 +159,7 @@ def exchange(self, apdu, timeout=TIMEOUT):
 		if self.debug:
 			print("HID <= %s%.2x" % (response.hex(), sw))
 		if sw != 0x9000 and (sw & 0xFF00) != 0x6100 and (sw & 0xFF00) != 0x6C00:
-			possibleCause = "Unknown reason"
-			if sw == 0x6982:
-				possibleCause = "Have you uninstalled the existing CA with resetCustomCA first?"
-			if sw == 0x6985:
-				possibleCause = "Condition of use not satisfied (denied by the user?)"
-			if sw == 0x6a84 or sw == 0x6a85:
-				possibleCause = "Not enough space?"
-			if sw == 0x6a83:
-				possibleCause = "Maybe this app requires a library to be installed first?"
-			if sw == 0x6484:
-				possibleCause = "Are you using the correct targetId?"
-			if sw == 0x6d00:
-				possibleCause = "Unexpected state of device: verify that the right application is opened?"
-			if sw == 0x6e00:
-				possibleCause = "Unexpected state of device: verify that the right application is opened?"
+			possibleCause = get_possible_error_cause(sw)
 			raise CommException("Invalid status %04x (%s)" % (sw, possibleCause), sw, response)
 		return response
 
@@ -194,21 +200,8 @@ def exchange(self, apdu, timeout=TIMEOUT):
 		response = self.tag.transceive(apdu, 5.0)
 		sw = (response[-2] << 8) + response[-1]
 		if sw != 0x9000 and (sw & 0xFF00) != 0x6100 and (sw & 0xFF00) != 0x6C00:
-			possibleCause = "Unknown reason"
-			if sw == 0x6982:
-				possibleCause = "Have you uninstalled the existing CA with resetCustomCA first?"
-			if sw == 0x6985:
-				possibleCause = "Condition of use not satisfied (denied by the user?)"
-			if sw == 0x6a84 or sw == 0x6a85:
-				possibleCause = "Not enough space?"
-			if sw == 0x6a83:
-				possibleCause = "Maybe this app requires a library to be installed first?"
-			if sw == 0x6484:
-				possibleCause = "Are you using the correct targetId?"
-			if sw == 0x6d00:
-				possibleCause = "Unexpected state of device: verify that the right application is opened?"
-			if sw == 0x6e00:
-				possibleCause = "Unexpected state of device: verify that the right application is opened?"
+			possibleCause = get_possible_error_cause(sw)
+			self.close()
 			raise CommException("Invalid status %04x (%s)" % (sw, possibleCause), sw, response)
 		if self.debug:
 			print(f"[NFC] <= {response.hex()}")
@@ -241,21 +234,7 @@ def exchange(self, apdu, timeout=TIMEOUT):
 		if self.debug:
 			print("[BLE] <= %s%.2x" % (response.hex(), sw))
 		if sw != 0x9000 and (sw & 0xFF00) != 0x6100 and (sw & 0xFF00) != 0x6C00:
-			possibleCause = "Unknown reason"
-			if sw == 0x6982:
-				possibleCause = "Have you uninstalled the existing CA with resetCustomCA first?"
-			if sw == 0x6985:
-				possibleCause = "Condition of use not satisfied (denied by the user?)"
-			if sw == 0x6a84 or sw == 0x6a85:
-				possibleCause = "Not enough space?"
-			if sw == 0x6a83:
-				possibleCause = "Maybe this app requires a library to be installed first?"
-			if sw == 0x6484:
-				possibleCause = "Are you using the correct targetId?"
-			if sw == 0x6d00:
-				possibleCause = "Unexpected state of device: verify that the right application is opened?"
-			if sw == 0x6e00:
-				possibleCause = "Unexpected state of device: verify that the right application is opened?"
+			possibleCause = get_possible_error_cause(sw)
 			self.close()
 			raise CommException("Invalid status %04x (%s)" % (sw, possibleCause), sw, response)
 		return response
diff --git a/pyproject.toml b/pyproject.toml
index c8df586..3b8bd44 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -11,7 +11,7 @@ name = "ledgerblue"
 authors = [
     { name = "Ledger", email = "hello@ledger.fr" }
 ]
-description = "Python library to communicate with Ledger Blue/Nano S"
+description = "Python library to communicate with Ledger devices"
 readme = { file = "README.md", content-type = "text/markdown" }
 license = { file = "LICENSE" }
 classifiers = [