BT Sign v4.30.9
APK · 28.6 MB · version code 43009002 · Android 5.0+ · uploaded Nov 14, 2025
- Signature matches the Google Play version Details
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File information
- Version
- v4.30.9 (43009002)
- Uploaded
- Nov 14, 2025
- Size
- 28.6 MB
- Requires
- Android 5.0+ (API 21)
- CPU support
- x86 32-bit, x86 64-bit, ARM 32-bit, ARM 64-bit
- Screen
- Small screens and larger
- MD5
- dc4448017eee8d0cde96b5ee72f5c218
- Signing certificate (SHA-1)
- C5:3A:E4:AC:FD:A1:E7:A1:83:B4:5F:AE:9F:16:9A:11:CC:2C:8D:28
- Signed by
- CN=Android, OU=Android, O=Google Inc., L=Mountain View, ST=California, C=US
- File name
- com-btultrasign-43009002-72327894-dc4448017eee8d0cde96b5ee72f5c218.apk
- Package
- com.btultrasign
- Downloads (all versions)
- 50K+
- Age rating
- PEGI 3 · Everyone
What's new in v4.30.9
Security improvements.
Permissions (8)
This version requests 8 permissions, 3 of them sensitive.
- Camera Sensitive android.permission.CAMERA
- Read phone status and identity Sensitive android.permission.READ_PHONE_STATE
- See all installed apps Sensitive android.permission.QUERY_ALL_PACKAGES
- Context write use app feature survey (custom) com.samsung.android.providers.context.permission.WRITE_USE_APP_FEATURE_SURVEY
- Control vibration android.permission.VIBRATE
- Google Play install referrer com.google.android.finsky.permission.BIND_GET_INSTALL_REFERRER_SERVICE
- Use fingerprint hardware android.permission.USE_FINGERPRINT
- View network connections android.permission.ACCESS_NETWORK_STATE
Security & authenticity
Security rating: Trusted
Signing certificate
- Signature matches the Google Play version Checked by the source store on Nov 14, 2025.
- Certificate from Google Play App Signing Google keeps the signing key for the developer, so the certificate carries Google's name.
- Same certificate as the other version checked
Store checks
- Developer signature verified Nov 14, 2025
- Validated against Google Play Nov 14, 2025
- Uploaded by “appupdater” Gold tier · 117,810 followers · uploading since 2020
Scans come from the source store; the certificate comparisons are AAPKs's own, made from the files' published signatures (1 other version compared). AAPKs doesn't scan files itself.
How to install BT Sign on Android 5.0+
You'll need about 57.1 MB of free space.
- Download the APK — tap Download APK above (28.6 MB). Chrome shows “File might be harmful” for every APK file; choose Download anyway only if you trust this file.
- Open the file — tap the download notification, or open Files › Downloads and tap com-btultrasign-43009002-72327894-dc4448017eee8d0cde96b5ee72f5c218.apk.
- Allow the install (first time only) — Android 8 and later asks for permission the first time an app opens an APK: tap Settings in the prompt, turn on Allow from this source, then go back. Manual path: Settings › Apps › Special app access › Install unknown apps (on Samsung: Settings › Apps › ⋮ › Special access). On Android 7 and older: Settings › Security › Unknown sources.
- Check the file (optional) — the MD5 of the downloaded file should be dc4448017eee8d0cde96b5ee72f5c218. If it differs, the file is damaged or was changed: delete it and download again.
- Tap Install — Android asks “Do you want to install this app?”. If Google Play Protect shows a warning, read it before you continue: the source store rated this file Trusted, but only install apps from sources you trust. If an earlier version is installed, this one only installs as an update when it is signed with the same certificate (SHA-1 shown above).
- Open BT Sign — tap Open on the install screen, or find it in your app drawer.
Common install problems
- “App not installed” — a version signed with a different certificate, or a newer version, is already installed (Android doesn't allow downgrades). Uninstall it first; back up your data, because uninstalling deletes it.
- “There was a problem parsing the package” — the file is incomplete, or your Android is too old (this version needs Android 5.0+). Download it again, or pick an older version.
- “App not compatible with your device” — this build contains native code for x86 32-bit, x86 64-bit, ARM 32-bit, ARM 64-bit only. Devices with other processors can't install it.
- Blocked by Play Protect — Play Protect checks apps from outside the Play Store. Only continue if you trust the source.