ZTE Trek 2 HD (K88) Firmware Flash File Download [Stock Rom]
The ZTE Trek 2 HD (model K88) is an 8-inch Android tablet that was sold by AT&T in the USA. This page provides the official OTA (Over-The-Air) update package to upgrade the device from Android 6.0 Marshmallow to Android 7.0 Nougat. This is particularly useful for users who never received the update automatically, or whose update process failed and caused software issues.
Important Note: This is an OTA update package, not a full firmware for unbricking a dead device. It must be installed on a functioning tablet. Your device must also be on the 100% stock, un-rooted Android 6.0 (Marshmallow) firmware for the update to install successfully.
Quick Device Specs
- Device
- ZTE Trek 2 HD (K88)
- Release year
- 2017
- Chipset
- Qualcomm Snapdragon 617
- Display
- 8.0″ HD IPS LCD (1280×800)
- Battery
- 4600 mAh (Non-removable)
- Memory
- 2GB RAM + 16GB storage
- OS
- Android 6.0 (Marshmallow), Upgradable to 7.0 (Nougat)
- Carrier
- AT&T (USA)
Required Downloads
You only need the OTA update file itself to perform this installation. No PC or special tools are required.
Stock ROM & Firmware
| Version | Android | Carrier | Type | Download | Size |
|---|---|---|---|---|---|
| V2.0.0 | 7.0 (Nougat) | AT&T (USA) | OTA | Download | ~1.2 GB |
Quick Installation Guide
There are two methods to install an OTA update package.
- Via Settings Menu: Download the `.zip` file and move it to the main (root) directory of your internal storage. Go to `Settings` > `System` > `System Update`, tap the menu icon in the corner, select `Local update`, and choose the file.
- Via Stock Recovery: Download the `.zip` file and move it to your internal storage or SD card. Power off the tablet, then boot into recovery mode (hold Volume Up + Power). Select `Apply update from…` and choose the `.zip` file.
For a complete, step-by-step tutorial with screenshots for both methods, please refer to our definitive guide:
How to Manually Install Official OTA Updates on Android
FAQs
Q1. My automatic update to Nougat failed. Can I use this file?
Yes. This manual OTA package is the perfect solution for users whose automatic update process failed. Installing it via stock recovery is the most reliable way to complete the upgrade to Android 7.0 Nougat.
Q2. Will this update remove the AT&T apps (bloatware)?
No. This is an official update from AT&T. It will keep all existing carrier apps and may even install new ones. To manage them, you can go to `Settings > Apps` and “Disable” any apps you don’t use.
Q3. Is this the same as the K81 model of the Trek 2 HD?
The K88 and K81 are both Trek 2 HD tablets from AT&T with nearly identical hardware. However, they have different software builds and partitions. It is crucial to use the correct OTA for your specific model number (K88) to ensure a successful update. This file will not work on a K81.
Device-Specific Troubleshooting
- Increased Battery Drain After Nougat Update: Some users reported worse battery life after this update. After a successful installation, it is highly recommended to boot into recovery mode and perform a `Wipe cache partition`. This clears out old system files from Marshmallow and can significantly improve battery performance on Nougat.
- “Verification Failed” During Installation: This error means your system has been modified (rooted) or you are not on the correct stock Android 6.0 version required for this update. This OTA must be installed on an unmodified Marshmallow system. If your device is bootlooping with a “dm-verity” error, you cannot use this OTA; you need a full QFIL firmware package first.
- AT&T Apps Crashing After Update: After the major OS upgrade to Nougat, some pre-installed carrier apps may become unstable. Go to the Google Play Store and update all your apps. If a specific AT&T app is still crashing, try clearing its cache and data via `Settings > Apps`.
- Wi-Fi is Unstable After Update: This update includes new drivers. If your Wi-Fi is still unstable, the first step is to “forget” all saved networks and reconnect. If that fails, a `Network settings reset` in `Settings > Backup & reset` can fix persistent connectivity issues (this will erase saved Wi-Fi and Bluetooth pairings).
