diff --git a/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/activities/FwAppInstallerActivity.java b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/activities/FwAppInstallerActivity.java
index 0ebabb11..1abd25a3 100644
--- a/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/activities/FwAppInstallerActivity.java
+++ b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/activities/FwAppInstallerActivity.java
@@ -224,6 +224,11 @@ public class FwAppInstallerActivity extends GBActivity implements InstallActivit
         fwAppInstallTextView.setText(text);
     }
 
+    @Override
+    public CharSequence getInfoText() {
+        return fwAppInstallTextView.getText();
+    }
+
     @Override
     public void setInstallEnabled(boolean enable) {
         boolean enabled = device != null && device.isConnected() && enable;
diff --git a/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/activities/InstallActivity.java b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/activities/InstallActivity.java
index b00c1dfd..4af5405e 100644
--- a/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/activities/InstallActivity.java
+++ b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/activities/InstallActivity.java
@@ -19,6 +19,8 @@ package nodomain.freeyourgadget.gadgetbridge.activities;
 import nodomain.freeyourgadget.gadgetbridge.model.ItemWithDetails;
 
 public interface InstallActivity {
+    CharSequence getInfoText();
+
     void setInfoText(String text);
 
     void setInstallEnabled(boolean enable);
@@ -26,4 +28,5 @@ public interface InstallActivity {
     void clearInstallItems();
 
     void setInstallItem(ItemWithDetails item);
+
 }
diff --git a/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/miband/AbstractMiBandFWInstallHandler.java b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/miband/AbstractMiBandFWInstallHandler.java
index ba009e33..d52b698b 100644
--- a/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/miband/AbstractMiBandFWInstallHandler.java
+++ b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/miband/AbstractMiBandFWInstallHandler.java
@@ -48,6 +48,14 @@ public abstract class AbstractMiBandFWInstallHandler implements InstallHandler {
         }
     }
 
+    public Context getContext() {
+        return mContext;
+    }
+
+    public AbstractMiBandFWHelper getHelper() {
+        return helper;
+    }
+
     protected abstract AbstractMiBandFWHelper createHelper(Uri uri, Context context) throws IOException;
 
 
diff --git a/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/miband2/MiBand2FWInstallHandler.java b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/miband2/MiBand2FWInstallHandler.java
index af1336aa..8ea09a15 100644
--- a/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/miband2/MiBand2FWInstallHandler.java
+++ b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/miband2/MiBand2FWInstallHandler.java
@@ -24,10 +24,14 @@ import org.slf4j.LoggerFactory;
 
 import java.io.IOException;
 
+import nodomain.freeyourgadget.gadgetbridge.R;
+import nodomain.freeyourgadget.gadgetbridge.activities.InstallActivity;
 import nodomain.freeyourgadget.gadgetbridge.devices.miband.AbstractMiBandFWHelper;
 import nodomain.freeyourgadget.gadgetbridge.devices.miband.AbstractMiBandFWInstallHandler;
 import nodomain.freeyourgadget.gadgetbridge.impl.GBDevice;
 import nodomain.freeyourgadget.gadgetbridge.model.DeviceType;
+import nodomain.freeyourgadget.gadgetbridge.service.devices.miband2.FirmwareType;
+import nodomain.freeyourgadget.gadgetbridge.util.Version;
 
 public class MiBand2FWInstallHandler extends AbstractMiBandFWInstallHandler {
     private static final Logger LOG = LoggerFactory.getLogger(MiBand2FWInstallHandler.class);
@@ -36,6 +40,55 @@ public class MiBand2FWInstallHandler extends AbstractMiBandFWInstallHandler {
         super(uri, context);
     }
 
+    @Override
+    public void validateInstallation(InstallActivity installActivity, GBDevice device) {
+        super.validateInstallation(installActivity, device);
+        maybeAddFw53Hint(installActivity, device);
+    }
+
+    private void maybeAddFw53Hint(InstallActivity installActivity, GBDevice device) {
+        FirmwareType type = getFirmwareType();
+        if (type != FirmwareType.FIRMWARE) {
+            return;
+        }
+
+        Version deviceVersion = getFirmwareVersionOf(device);
+        if (deviceVersion != null) {
+            Version v53 = new Version("1.0.0.53");
+            if (deviceVersion.compareTo(v53) < 0) {
+                String vInstall = getHelper().format(getHelper().getFirmwareVersion());
+                if (vInstall == null || new Version(vInstall).compareTo(v53) > 0) {
+                    String newInfoText = getContext().getString(R.string.mi2_fw_installhandler_fw53_hint, v53.get()) + "\n\n" + installActivity.getInfoText();
+                    installActivity.setInfoText(newInfoText);
+                }
+            }
+        }
+    }
+
+    private Version getFirmwareVersionOf(GBDevice device) {
+        String version = device.getFirmwareVersion();
+        if (version == null || version.length() == 0) {
+            return null;
+        }
+        if (version.charAt(0) == 'V') {
+            version = version.substring(1);
+        }
+        try {
+            return new Version(version);
+        } catch (Exception ex) {
+            LOG.error("Unable to parse version: " + version);
+            return null;
+        }
+    }
+
+    private FirmwareType getFirmwareType() {
+        AbstractMiBandFWHelper helper = getHelper();
+        if (helper instanceof MiBand2FWHelper) {
+            return ((MiBand2FWHelper) helper).getFirmwareInfo().getFirmwareType();
+        }
+        return FirmwareType.INVALID;
+    }
+
     @Override
     protected AbstractMiBandFWHelper createHelper(Uri uri, Context context) throws IOException {
         return new MiBand2FWHelper(uri, context);
diff --git a/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/util/CheckSums.java b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/util/CheckSums.java
index b0a8030e..e7679301 100644
--- a/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/util/CheckSums.java
+++ b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/util/CheckSums.java
@@ -16,6 +16,13 @@
     along with this program.  If not, see <http://www.gnu.org/licenses/>. */
 package nodomain.freeyourgadget.gadgetbridge.util;
 
+import java.io.ByteArrayOutputStream;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileNotFoundException;
+import java.io.IOException;
+import java.io.InputStream;
+
 public class CheckSums {
     public static int getCRC8(byte[] seq) {
         int len = seq.length;
@@ -51,4 +58,31 @@ public class CheckSums {
         crc &= 0xffff;
         return crc;
     }
+
+    public static void main(String[] args) throws IOException {
+        if (args == null || args.length == 0) {
+            throw new IllegalArgumentException("Pass the files to be checksummed as arguments");
+        }
+        for (String name : args) {
+            try (FileInputStream in = new FileInputStream(name)) {
+                byte[] bytes = readAll(in, 1000 * 1000);
+                System.out.println(name + " : " + getCRC16(bytes));
+            }
+        }
+    }
+
+    public static byte[] readAll(InputStream in, long maxLen) throws IOException {
+        ByteArrayOutputStream out = new ByteArrayOutputStream(Math.max(8192, in.available()));
+        byte[] buf = new byte[8192];
+        int read = 0;
+        long totalRead = 0;
+        while ((read = in.read(buf)) > 0) {
+            out.write(buf, 0, read);
+            totalRead += read;
+            if (totalRead > maxLen) {
+                throw new IOException("Too much data to read into memory. Got already " + totalRead + buf);
+            }
+        }
+        return out.toByteArray();
+    }
 }
diff --git a/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/util/Version.java b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/util/Version.java
new file mode 100644
index 00000000..3d363745
--- /dev/null
+++ b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/util/Version.java
@@ -0,0 +1,48 @@
+package nodomain.freeyourgadget.gadgetbridge.util;
+
+// http://stackoverflow.com/questions/198431/how-do-you-compare-two-version-strings-in-java
+public class Version implements Comparable<Version> {
+
+    private String version;
+
+    public final String get() {
+        return this.version;
+    }
+
+    public Version(String version) {
+        if(version == null)
+            throw new IllegalArgumentException("Version can not be null");
+        if(!version.matches("[0-9]+(\\.[0-9]+)*"))
+            throw new IllegalArgumentException("Invalid version format");
+        this.version = version;
+    }
+
+    @Override public int compareTo(Version that) {
+        if(that == null)
+            return 1;
+        String[] thisParts = this.get().split("\\.");
+        String[] thatParts = that.get().split("\\.");
+        int length = Math.max(thisParts.length, thatParts.length);
+        for(int i = 0; i < length; i++) {
+            int thisPart = i < thisParts.length ?
+                    Integer.parseInt(thisParts[i]) : 0;
+            int thatPart = i < thatParts.length ?
+                    Integer.parseInt(thatParts[i]) : 0;
+            if(thisPart < thatPart)
+                return -1;
+            if(thisPart > thatPart)
+                return 1;
+        }
+        return 0;
+    }
+
+    @Override public boolean equals(Object that) {
+        if(this == that)
+            return true;
+        if(that == null)
+            return false;
+        if(this.getClass() != that.getClass())
+            return false;
+        return this.compareTo((Version) that) == 0;
+    }
+}
\ No newline at end of file
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 61453fbe..4f6039a3 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -406,4 +406,5 @@
     <string name="StringUtils_sender"> (%1$s)</string>
     <string name="find_device_you_found_it">You found it!</string>
     <string name="miband2_prefs_timeformat">Mi2: Time Format</string>
+    <string name="mi2_fw_installhandler_fw53_hint">You need to install version %1$s before installing this firmware!</string>
 </resources>