Contact Backup
v1.5 · 4.4 MB · code 6
Verify you're human
Solve this to start the download.
File information
UpdatedJul 22, 2022
PublishedAug 23, 2020
Packagecom.dss.contactbackup
Versionv1.5 (6)
Size4.4 MB
MD5c331b9ed37030f1118567907aef8393c
Min SDK16
Malware scanTRUSTED
Signature SHA13D:F9:1E:7A:7D:17:45:E2:0D:57:15:56:62:A6:E0:82:CF:83:A3:B8
SignerCN=RJ, OU=1, O=DSS, L=RJ, ST=GJ, C=91
Total downloads1,000
This version1,000
DeveloperRJ Developers
Age ratingEveryone
Security scan
TRUSTED
- Developer signature verified 2020-12-22
- Signature SHA1 3D:F9:1E:7A:7D:17:45:E2:0D:57:15:56:62:A6:E0:82:CF:83:A3:B8
- File MD5 c331b9ed37030f1118567907aef8393c
How to install Contact Backup v1.5 on Android API 16+
Takes about 2 minutes. You'll need roughly 4.4 MB of free storage.
- Grab com.dss.contactbackup_6.apk — hit the Download button above (4.4 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 c331b9ed37030f11…. Any difference means the file is corrupted or tampered — delete and re-download.
- Open the APK — tap the download notification, or find com.dss.contactbackup_6.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=RJ, OU=1, O=DSS, L=RJ, ST=GJ, C=91. 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 Contact Backup — tap Open on the install screen, or find the Contact Backup icon in your app drawer.
Common install errors for Contact Backup
- "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 API 16 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.