Mobile Key
v3.3.4 · 13.7 MB · code 12119
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File information
UpdatedNov 4, 2025
PublishedMay 3, 2021
Packagecz.quanti.helios_nfc
Versionv3.3.4 (12119)
Size13.7 MB
MD51e52f90d34e7b8ed6f7d95cdec5cb5ac
Min SDK26
ABIsx86, x86-64, armeabi-v7a, arm64-v8a
Malware scanTRUSTED
Signature SHA1B3:6F:01:7D:60:48:6D:02:19:77:49:F1:AE:85:12:30:D5:48:2E:C0
SignerCN=Unknown, OU=Unknown, O=2N TELEKOMUNIKACE a.s., L=Prague, ST=Unknown, C=CZ
Total downloads100,000
This version100,000
Developer2N Telekomunikace a.s.
Age ratingEveryone
What's new in v3.3.4
Improvements
- Improve NFC behavior when changing operation mode on some devices
- Add more detailed description of error states when opening door
- Improved performance of Bluetooth pairing
Bug fixes
- Prevent Bluetooth connections becoming unexpectedly stuck
- Improve NFC behavior when changing operation mode on some devices
- Add more detailed description of error states when opening door
- Improved performance of Bluetooth pairing
Bug fixes
- Prevent Bluetooth connections becoming unexpectedly stuck
Security scan
TRUSTED
- Developer signature verified 2025-11-04
- Signature SHA1 B3:6F:01:7D:60:48:6D:02:19:77:49:F1:AE:85:12:30:D5:48:2E:C0
- File MD5 1e52f90d34e7b8ed6f7d95cdec5cb5ac
How to install Mobile Key v3.3.4 on Android 8.0 Oreo+
Takes about 2 minutes. You'll need roughly 13.7 MB of free storage.
- Grab cz.quanti.helios_nfc_12119.apk — hit the Download button above (13.7 MB). If your browser warns about APK files, choose Keep or Download anyway — that warning fires on every APK, not just this one.
- Trust your browser to install — on Android 8+ go to Settings → Apps → Special access → Install unknown apps, pick the app you downloaded with (Chrome, Firefox, Files, etc.), and flip Allow from this source. On older Android, toggle Unknown sources under Security.
- (Optional) Verify the file — compute the MD5 of the downloaded APK and make sure it matches 1e52f90d34e7b8ed…. Any difference means the file is corrupted or tampered — delete and re-download.
- Open the APK — tap the download notification, or find cz.quanti.helios_nfc_12119.apk in your Files app under Downloads, then tap it. Android's package installer will appear.
- Check the signer — the install screen will name the publisher. For this build it should read CN=Unknown, OU=Unknown, O=2N TELEKOMUNIKACE a.s., L=Prague, ST=Unknown, C=CZ. If it doesn't match, cancel — you have the wrong file.
- Review permissions & tap Install — scroll the permission list, then confirm. If Play Protect flags it, tap Install anyway (this APK was scanned as TRUSTED).
- Done — open Mobile Key — tap Open on the install screen, or find the Mobile Key icon in your app drawer (this build targets x86/x86-64/armeabi-v7a/arm64-v8a devices).
Common install errors for Mobile Key
- "App not installed" — usually means an older or differently-signed version is already on your device. Uninstall it first, then retry. Your data may be lost unless you back it up.
- "Parse error" — the APK is for a newer Android than yours. This version needs Android 8.0 Oreo or later. Pick an older build from the versions list below.
- "There was a problem parsing the package" — the download was interrupted. Delete the file and re-download over Wi-Fi.
- Works on one phone but not another — this build ships x86/x86-64/armeabi-v7a/arm64-v8a native code. Devices with a different CPU will reject it.