diff --git a/Makefile b/Makefile
index 596ae4a..6e87c87 100644
--- a/Makefile
+++ b/Makefile
@@ -13,6 +13,9 @@ cov:
 			--cov-report xml \
 			--cov-report term
 
+sync:
+	cd uiautomator2/assets; ./sync.sh; cd -
+
 build:
 	poetry self add "poetry-dynamic-versioning[plugin]"
 	cd uiautomator2/assets; ./sync.sh; cd -
@@ -24,3 +27,4 @@ init:
 		wget https://github.com/appium/appium/raw/master/packages/appium/sample-code/apps/ApiDemos-debug.apk; \
 	fi
 	poetry run python -m adbutils -i ./ApiDemos-debug.apk
+
diff --git a/docs/2to3.md b/docs/2to3.md
index be9afbe..c87f723 100644
--- a/docs/2to3.md
+++ b/docs/2to3.md
@@ -159,3 +159,7 @@ print(d.device_info)
  'arch': 'arm64-v8a',
  'version': 12}
  ```
+
+ ### app_current
+ - 2.x raise `OSError` if couldn't get focused app
+ - 3.x raise `DeviceError` if couldn't get focused app
diff --git a/uiautomator2/__init__.py b/uiautomator2/__init__.py
index af6d69f..83abe56 100644
--- a/uiautomator2/__init__.py
+++ b/uiautomator2/__init__.py
@@ -24,7 +24,7 @@
 from uiautomator2 import xpath
 from uiautomator2._proto import HTTP_TIMEOUT, SCROLL_STEPS, Direction
 from uiautomator2._selector import Selector, UiObject
-from uiautomator2.exceptions import AdbShellError, BaseException, HierarchyEmptyError, SessionBrokenError
+from uiautomator2.exceptions import AdbShellError, BaseException, DeviceError, HierarchyEmptyError, SessionBrokenError
 from uiautomator2.settings import Settings
 from uiautomator2.swipe import SwipeExt
 from uiautomator2.utils import list2cmdline
@@ -133,7 +133,7 @@ def shell(self, cmdargs: Union[str, List[str]], timeout=60) -> ShellResponse:
             raise AdbShellError(e)
 
     @property
-    def info(self):
+    def info(self) -> Dict[str, Any]:
         return self.jsonrpc.deviceInfo(http_timeout=10)
     
     @property
@@ -442,14 +442,10 @@ def press(self, key: Union[int, str], meta=None):
             delete(or del), recent(recent apps), volume_up, volume_down,
             volume_mute, camera, power.
         """
-        if key in ("home", "back", "enter", "volume_up", "volume_down", "volume_mute", "power", "wakeup"):
-            self.keyevent(key)
-            return
         if isinstance(key, int):
             return self.jsonrpc.pressKeyCode(
                 key, meta) if meta else self.jsonrpc.pressKeyCode(key)
         else:
-            # FIXME: not working with Huiawei P50
             return self.jsonrpc.pressKey(key)
 
     def screen_on(self):
@@ -636,7 +632,7 @@ def app_current(self):
             dict(package, activity, pid?)
 
         Raises:
-            OSError
+            DeviceError
 
         For developer:
             Function reset_uiautomator need this function, so can't use jsonrpc here.
@@ -644,7 +640,7 @@ def app_current(self):
         info = self.adb_device.app_current()
         if info:
             return dataclasses.asdict(info)
-        raise OSError("Couldn't get focused app")
+        raise DeviceError("Couldn't get focused app")
 
     def app_install(self, data: str):
         """
@@ -1022,6 +1018,29 @@ def swipe_ext(self) -> SwipeExt:
 class Device(_Device, _AppMixIn, _PluginMixIn, _InputMethodMixIn, _DeprecatedMixIn):
     """ Device object """
 
+    @property
+    def info(self) -> Dict[str, Any]:
+        """ return device info, make sure currentPackageName is set
+        
+        Return example:
+           {'currentPackageName': 'io.appium.android.apis',
+            'displayHeight': 720,
+            'displayRotation': 3,
+            'displaySizeDpX': 780,
+            'displaySizeDpY': 360,
+            'displayWidth': 1560,
+            'productName': 'ELE-AL00',
+            'screenOn': True,
+            'sdkInt': 29,
+            'naturalOrientation': False}
+        """
+        _info = super().info
+        if _info.get('currentPackageName') is None:
+            try:
+                _info['currentPackageName'] = self.app_current().get('package')
+            except DeviceError:
+                pass
+        return _info
 
 class Session(Device):
     """Session keeps watch the app status
@@ -1061,8 +1080,6 @@ def __exit__(self, exc_type, exc_val, exc_tb):
         self.close()
 
 
-
-
 def connect(serial: Union[str, adbutils.AdbDevice] = None) -> Device:
     """
     Args:
diff --git a/uiautomator2/assets/sync.sh b/uiautomator2/assets/sync.sh
index c345ca2..95644d9 100755
--- a/uiautomator2/assets/sync.sh
+++ b/uiautomator2/assets/sync.sh
@@ -3,7 +3,7 @@
 
 set -e
 
-APK_VERSION="2.3.3"
+APK_VERSION="2.3.6"
 # AGENT_VERSION="0.10.1"
 
 cd "$(dirname $0)"
@@ -22,7 +22,7 @@ function download_apk(){
 	VERSION=$1
 	NAME=$2
 	URL="https://github.com/openatx/android-uiautomator-server/releases/download/$VERSION/$NAME"
-	echo "$URL"
+	echo ">> download $URL -> $NAME"
 	curl -L "$URL" --output "$NAME"
 	unzip -tq "$NAME"
 }
@@ -33,4 +33,4 @@ function download_apk(){
 download_apk "$APK_VERSION" "app-uiautomator.apk"
 download_apk "$APK_VERSION" "app-uiautomator-test.apk"
 
-echo "apk_version: $APK_VERSION" > version.txt
\ No newline at end of file
+echo "apk_version: $APK_VERSION" > version.txt
diff --git a/uiautomator2/core.py b/uiautomator2/core.py
index b5e1381..9400fc0 100644
--- a/uiautomator2/core.py
+++ b/uiautomator2/core.py
@@ -128,11 +128,16 @@ def _jsonrpc_call(dev: adbutils.AdbDevice, method: str, params: Any, timeout: fl
         logger.debug("jsonrpc error: %s", data)
         code = data['error'].get('code')
         message = data['error'].get('message')
+        stacktrace = data['error'].get('data')
         if "UiAutomation not connected" in r.text:
             raise UiAutomationNotConnectedError("UiAutomation not connected")
+        if "android.os.DeadObjectException" in message:
+            # https://developer.android.com/reference/android/os/DeadObjectException
+            raise UiAutomationNotConnectedError("android.os.DeadObjectException")
         if "uiautomator.UiObjectNotFoundException" in message:
             raise UiObjectNotFoundError(code, message, params)
-        raise RPCUnknownError(f"Unknown RPC error: {code} {message}", params)
+        raise RPCUnknownError(f"Unknown RPC error: {code} {message}", params, stacktrace)
+    
     
     if "result" not in data:
         raise RPCInvalidError("Unknown RPC error: no result field")