How to Check That Your Signal Install Actually Worked

Published: October 7, 2026 · Updated: October 8, 2026

You tapped the APK, the install finished, and Signal opened. So you are done, right? Not quite. A finished install only proves the file unpacked. It does not prove you installed the real Signal, that the build is current, or that everything you rely on (messages, calls, backups, updates) actually works. This page gives you an 8-point verification checklist. Run it once, right after installing: confirm the package name is org.thoughtcrime.securesms and the version reads v8.29.3, sanity-check the permissions, send a test message and make a test call, write your backup passphrase on paper, check that notifications arrive, and confirm the app can check for updates. Each check below tells you what it proves and exactly what to do if it fails. Ten minutes now saves you from discovering a broken install at the worst possible moment.

A finished install is not a proven install

Most people treat the install like a finish line. The progress bar completes, the icon appears, the app opens, and they move on. The problem is that Android's installer is not very picky: it will happily install a file that is corrupted, outdated, signed by the wrong key, or a lookalike app wearing Signal's clothes. The installer only checks that the file is a valid package. It does not check that it is the right package.

That is why verification is a separate job from installation, and it matters more for a sideloaded APK than for a Play Store install. The Play Store does some of this checking for you: it confirms the publisher, it handles updates, and it will not serve you a tampered file. When you install the APK directly from Signal's download page, those guardrails are yours to run. The good news is that none of it is hard. You already did the difficult part by getting the file from the right place; what follows is just confirming that everything landed the way it should.

Think of it the way you would think of buying a used car. The seller hands you the keys. That is the install. You still check the engine, the paperwork, and the tires before you drive it home. That is this checklist.

The 8-point checklist (and what each check proves)

Here is the full list in one place. The sections below walk through each check with screenshots-style directions and fixes, but if you already know your way around Android, this table alone is enough.

A note on order: the list is arranged so that the security checks (1–3) come first. If the package name is wrong, nothing else matters. Stop there and uninstall. The functional checks (4–8) only make sense on a build you have already confirmed is genuine.

Checks 1-2: package name and version

These two are the quick identity checks. The package name catches sloppy fakes; the version proves it is current Signal. Both take under a minute. (The decisive proof is the signing fingerprint, covered just below.)

Check 1: the package name. Every Android app has a unique package name, and Signal's is org.thoughtcrime.securesms: the same for the website build and the Play Store build. On some phones you can see it directly: open Settings → Apps → Signal → App info and look at the bottom of the screen. Stock Android hides it on many phones, which is annoying but not a dead end. Alternatives: install any file-manager app that lists installed packages, or, if you have a computer handy, run adb shell pm list packages | grep thoughtcrime with USB debugging on. What you are looking for is an exact match. Close does not count. A fake app can copy Signal's icon and name perfectly — and a careful fake copies the package name too. Package names are not reserved: nothing stops a malicious APK from declaring itself org.thoughtcrime.securesms. Android only refuses to install two same-named apps side by side, and a differently-signed fake cannot install over the real Signal — but on a phone where Signal was never installed, the fake goes on without complaint. So the package-name check only filters out lazy fakes. The check that actually proves the app is genuine is the signing certificate fingerprint, covered next.

Check 2: the version. Open Signal itself, tap your profile, go to Settings → Help → Version, and read the number. At the time of writing, the current website build is v8.29.3. If yours matches, you are current. If it is older, do not panic and do not reinstall yet. The website build updates itself, and check 8 covers that. What you do not want to see is a version number that looks nothing like Signal's numbering, or a version field that is blank. Our version-check walkthrough shows both ways to read the number with pictures of each screen.

One more identity check worth doing while you are here, if you checked the file before installing: Signal publishes the SHA-256 fingerprint of its signing certificate on its download page. Re-verified on 2026-10-07, it reads:
4B:E4:F6:CD:5B:E8:44:08:3E:90:02:79:DC:82:2A:F6
5A:54:7F:EC:C2:6A:BA:7F:F1:F5:20:3A:45:51:8C:D8
If you verified this fingerprint against the APK before installing, checks 1 and 2 are really just confirming that the installed app matches the file you checked. Belt and suspenders, but this is the kind of thing where belt and suspenders is the correct amount of caution.

Check 3: permissions sanity

Go to App info → Permissions and read the list slowly. You are not auditing code here. You are looking for anything that makes no sense for a messaging app. Signal legitimately needs contacts (to find your friends), the microphone and camera (calls and photo messages), storage or media (sending files), and notifications. What it should never ask for is things like device-administrator access, the ability to draw over other apps for no reason, or accessibility-service control. Those are the permissions malware loves.

Two honest caveats. First, permission lists vary a bit between Android versions and phone brands, so do not panic over wording differences. Panic over categories that do not belong. Second, this check catches crude fakes, not sophisticated ones; a well-made fake can request a perfectly normal permission list. That is why this is check 3 and not check 1. The package name is the hard proof; permissions are the smell test. Our permission guide explains what each Signal permission actually does, so you can tell the difference between “normal” and “normal-looking.”

Checks 4-5: test message and test call

Identity confirmed. Now prove the thing works. These two checks exercise the two halves of Signal: the messaging path and the real-time calling path. They fail for different reasons, which is why there are two of them.

Check 4: send a test message. Pick any contact who has Signal, or message yourself using Signal's “Note to Self” chat, which every account gets. Send something, and watch for the single check mark (sent), then the double check mark (delivered). If the message sends and delivers, your registration is good, your number is verified, and the message pipeline works end to end. If it sits with a clock icon forever, the usual suspects are: registration did not actually complete (go back and finish the SMS-code step), the phone has no working data connection, or the contact you messaged is not actually on Signal. The sideload walkthrough covers the registration hiccups in detail.

Check 5: make a test call. Call the same contact, or anyone patient, for thirty seconds. You are testing three things at once: the microphone permission, the speaker/earpiece audio path, and whether your network lets real-time traffic through. If there is no audio on either side, the fix is almost always the microphone permission (App info → Permissions → Microphone → Allow) or an aggressive battery saver that is throttling the app in the background. If the call connects but the quality is terrible, that is your network, not the install. Try again on Wi-Fi before concluding anything.

Why both? Because they use different infrastructure. Messaging goes through Signal's servers with store-and-forward; calls are peer-to-peer where possible. An install can easily have one working and the other broken, typically because of a single denied permission, and you want to find that out now, not during an important call.