[Bug report] MLKit-GenAI Summarization Failed to Download Model

[jieyangjoanna]

Describe the bug
On Motorola Razr 60 Ultra device, AICore service is enabled by installing the google privately provided oss apk. As a result, Proofreading API, Rewriting API, and Open Prompt API are supported, however, Summarization API and Image Description API are not supported on nano-v3.

logs are:
Failed to download model: com.google.mlkit.genai.common.genAiException: [ErrorCode 0] AICore failed with error type 1-DOWNLOAD_ERROR and error code 0-UNKNOWN: Feature Summarization English (Non-Conversational) (QNN HTP) failed with failure status 0 and error dpf.
Cause: com.google.android.gms.internal.mlkit_genai_summarization.zzaw: AICore failed with error type 1-DOWNLOAD_ERROR and error code 0-UNKNOWN: Feature SAPI Summerization English (Non-Conversational) (QNN HTP) failed with failure status 0 and error dpf.

Failed to download model: com.google.mlkit.genai.common.genAiException: [ErrorCode 0] AICore failed with error type 1-DOWNLOAD_ERROR and error code 0-UNKNOWN: Feature SAPI Image Description English (QNN HTP) failed with failure status 0 and error dpf.
Cause: com.google.android.gms.internal.mlkit_genai_image_description.zzar: AICore failed with error type 1-DOWNLOAD_ERROR and error code 0-UNKNOWN: Feature SAPI Image Description English (Non-Conversational) (QNN HTP) failed with failure status 0 and error dpf.

To Reproduce
Example Steps to reproduce the behavior in sample app:

1. Go to 'MLKit-GenAI'
2. Click on 'Summarization API (Kotlin)'
3. Choose Language: 'English'
4. Input a prompt to be summarized.
5. See error

MLKit-GenAI app is built from this repo using genai directory, input prompt example: "Gemini Nano lets you deliver rich generative AI experiences without needing a network connection or sending data to the cloud. On-device AI is a great solution for use-cases where low cost, and privacy safeguards are your primary concerns."

Expected behavior
Prompt runs normally and output a one bullet sentence summary.

SDK Info:

• SDK Name & Version [e.g. com.google.mlkit.genai.demo:1.0]
• implementation 'com.google.mlkit:genai-image-description:1.0.0-beta1'
  implementation 'com.google.mlkit:genai-prompt:1.0.0-beta1'
  implementation 'com.google.mlkit:genai-proofreading:1.0.0-beta1'
  implementation 'com.google.mlkit:genai-rewriting:1.0.0-beta1'
  implementation 'com.google.mlkit:genai-summarization:1.0.0-beta1'

Smartphone:

• Device/Simulator: [e.g. Motorola SM8750 Razr 60 Ultra]
• Device/Simulator OS: [e.g. Android 15, API 35]

Development Environment:
(For Android issue feel free to skip this section)

• IDE Eversion: [ Android Studio Quail 2 | 2026.1.2]
• Laptop/Desktop: [Lenovo ThinkPad T14s Gen 6]
• Laptop/Desktop OS/version: [Windows 11 Pro, 26200.8655]