Hello,

Im looking for old firmwares for andorid app developement test.
Need firmware where VT SWGP GR0, BZF1 is not suported jet.
Can anybody help?

You’ll need an older Android firmware—likely Android 8 (Oreo) or earlier—before VT SWGP GR0, BZF1 support was introduced. Check XDA Developers or OEM archives for compatible firmware images.

If you need to test your Android app on legacy firmware—specifically on builds where features like VT SWGP GR0 and BZF1 aren’t yet available—you have two main routes: use emulator/system-image snapshots for older Android releases, or grab factory/fallback images from device vendors.
The simplest way to emulate an “old firmware Slice Master” environment is via the Android Emulator:
1. Android Studio → AVD Manager
2. Create Virtual Device → pick a hardware profile
3. Select System Image → choose an API level that predates VT SWGP GR0 / BZF1 support
If you don’t see the image you need, switch to the “x86 Images” or “Other Images” tabs.
4. Download & Launch

Because Google only adds new virtualization flags or kernel modules in specific API releases, running on, say, Android 9 (Pie) or below will guarantee neither VT SWGP GR0 nor BZF1 are present. This method is fast, free, and integrates directly into your dev workflow.