> ## Documentation Index
> Fetch the complete documentation index at: https://moengage.com/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# What are the Limitations of Push Amplification™ Plus?

> Review the SDK compatibility requirements and delivery service limitations of Push Amplification Plus before enabling it for your push campaigns.

Push Amplification™ Plus is designed to improve the delivery rate of push notifications by up to 40%, helping messages reach more users.  However, this service has certain limitations.

### SDK Compatibility

Push Amplification™ Plus is only available for the following SDKs from the specified versions onward:

| **Android SDK Type**    | **Push Amplification™ Plus Support on Huawei** |
| ----------------------- | ---------------------------------------------- |
| Native Android SDK      | SDK version 10.3.00 and above                  |
| React Native            | SDK version 6.0.0 and above                    |
| Segment Integration SDK | SDK version 4.2.00 and above                   |
| Flutter                 | SDK version 2.0.0 and above                    |
| Cordova                 | SDK version 6.0.0 and above                    |
| Unity                   | Not available                                  |
| Xamarin                 | Not available                                  |

### Limitations for the Direct Delivery Service

The following limitations apply to the direct delivery service and not to the fallback delivery service:

1. **No fallback mechanism**: The primary delivery service has a high delivery rate (75% to 95%), so the fallback mechanism of Push Amplification™ is not supported.
2. **No custom display**: The Push Amplification™ Plus enhanced delivery service doesn't support custom displays, where the client app handles notification display by parsing key-value pairs or by directly consuming the MoEngage payload.
3. **Character limits**: The maximum length for a title is 40 characters (including spaces), and the maximum length for a message is 1,024 characters (including spaces).
4. **No notification image support**: Huawei doesn't support notification images. However, small and large app icons are supported.
5. **No data payloads**: Sending data payloads is not supported.
6. **No customized notification channels**: The out-of-the-box channels provided by Huawei are not supported. You can use a custom channel or the MoEngage default channel. Unlike with FCM, the default channel will not work as a fallback for HMS if the setup is incorrect.
7. **No customizing notification message icons**: Customizing notification message icons is not supported.
8. **Other limitations**:
   * The "Notification Cleared" event will not be tracked.
   * The Notification Center will only display clicked notifications.
   * Notification clear callback will not work.
   * Notification received callbacks will not work.
   * Push templates will not work; only basic push notifications are supported.
   * Customizing push display properties will not work.
   * Controlling the display through key-value pairs will not work.