Google has just fixed the Quadrooter vulnerabilities for the Nexus they sell but the patches will take a while to filter down to other phones. This is not the best time to side load apps.
What difference does it make at all? An .apk downloaded from bitcointrezor.com isn't going to make your phone either more or less vulnerable to the pwnage bug affecting newer Snapdrgon SoC's. If you used Play Store to install Trezor Manager to a device with this flaw, the situation would be identical: pwned phone with properly verified Trezor App. Quelle difference.
As long as you use the Play Store only and do not enable unknown sources Google should keep malware off your phone.
Uhhhhh, that's terrible advice. Google will help to keep
3rd party malware off your phone. Any malware developed either in-house or by deep state agencies will be delivered straight to your device when ready. Noticed how Google are becoming more and more involved in global politics recently?
Your trust in Google is misplaced.
My advice to Android users:
- Gain root access
- Flash up to date OS (preferably compiled yourself)
- Install 3rd party App Store (make sure it has root privileges, I recommend the F-Droid Store)
- Do not install or use the Play Store (or other Google Apps)
- Regularly re-flash the latest OS updates (preferably compiled yourself)
I'm not saying that this is a perfect method, but it's a big improvement on "blindly trust the Play Store binary blob"