Switch Wi-Fi or mobile data and try again. Poor network quality can cause login failures, dropped calls, and delayed messages.
Install the latest version on your device. Older builds can break after Microsoft updates the service.
Allow microphone, camera, notifications, and background activity. Missing permissions are a common reason for call and audio problems.
Clear the app cache on mobile or reinstall Skype on desktop if it keeps crashing or will not launch correctly.
If Skype still acts broken, sign out completely, then log in again to refresh the account session.
Skype pushes frequent updates that patch security holes and fix call reliability issues. On desktop, enable automatic updates in Skype's settings under Help → Check for Updates and toggle automatic installation. On mobile, turn on auto-update in the App Store or Google Play Store so you never miss a critical patch. Running an outdated version is the single most common cause of unexplained Skype failures.
Skype needs background data access to receive incoming calls and messages when the app is not in the foreground. On Android, go to Settings → Apps → Skype → Mobile Data and ensure background data is allowed. On iPhone, enable Background App Refresh for Skype under Settings → General → Background App Refresh. Without this, the app appears offline to your contacts until you open it manually.
Skype stores thumbnails, emoji sets, and chat history locally. Over time this cache can grow to several gigabytes, causing slow performance and unexpected crashes. On desktop, go to Tools → Options → General and click Clear Cache. On mobile, go to Skype Settings → Storage and select Clear Cache. Doing this once a month keeps the app responsive and reduces the chance of sync conflicts.
If the desktop or mobile app refuses to connect, open web.skype.com in Chrome, Edge, or Firefox. The web client does not require installation and bypasses local app corruption. Sign in with your Microsoft account and test messaging and calling. If the web version works perfectly, the problem is isolated to your installed app and can be fixed with a clean reinstall rather than network troubleshooting.
A stale authentication token can prevent Skype from connecting even when your password is correct. On Windows, press Windows + R, type %appdata%\Microsoft\Skype for Desktop, delete the Local Storage folder, then restart Skype. On Mac, open Finder, press Cmd+Shift+G, enter ~/Library/Application Support/Skype, and delete the Local Storage folder. This forces Skype to fetch a fresh authentication token from Microsoft's servers.
Windows Defender, Norton, McAfee, and other security suites sometimes flag Skype's peer-to-peer connection as suspicious. Add Skype to your firewall's allowed apps list and create an exclusion in your antivirus software. On Windows Defender, go to Firewall & Network Protection → Allow an App Through Firewall and ensure both Private and Public checkboxes are ticked for Skype. After making changes, restart your computer to apply the new rules.
Sending failures usually come from a weak connection, an outdated app, or a sign-in/session issue.
Call failures are often caused by poor network quality, microphone or camera permission problems, or firewall restrictions.
Sign-in problems can happen if the Microsoft account has a stale session, the password is wrong, or the app needs updating.
Audio issues are usually caused by muted settings, wrong input/output devices, or blocked permissions.
Skype can become resource-heavy when it accumulates years of chat history and media files. Go to Settings → Messaging and disable message saving to free memory. On desktop, close unnecessary conversations and restart Skype weekly to clear memory leaks. If the problem persists, try the Skype UWP app from the Microsoft Store which is lighter than the desktop version.
Contacts appearing offline when they should be available is usually a sync issue. Sign out of Skype completely, restart your device, and sign back in. Also check that your status is not accidentally set to Appear Offline. If only specific contacts are affected, they may have privacy settings that hide their online status from your account.
Skype stores messages on Microsoft's servers for a limited time. If you deleted messages accidentally, sign in to the Skype web client and check your conversation history there. Messages deleted from the local cache cannot be recovered. Skype does not offer a recycle bin or trash folder, so think carefully before clearing individual conversations.
Try the same service on a different device or network. If it works elsewhere, the issue is local to your device or network. If it fails everywhere, the service itself may be down - check Downdetector or the service's official status page to confirm.
Yes. A full restart (not just closing the app) clears stale connections, frees memory, and resolves the majority of intermittent glitches. Try this before deeper troubleshooting steps.
Open the App Store (iPhone) or Google Play Store (Android) and search for the app - if an Update button appears, tap it. On desktop apps, look for an About or Check for Updates option in the menu. Outdated apps often break after server-side updates.
If clearing the cache, updating, and restarting have all failed, reinstall the app as a last resort. A clean reinstall removes corrupted data, settings, and permissions that the standard fix steps cannot reach. Your account and saved data are stored in the cloud, so you won't lose anything by reinstalling.