WhatsApp for Samsung Galaxy S25

This is usually a corrupted local install or a clash with One UI's background-data limits. Go to Settings > Apps > WhatsApp > Storage and tap Clear cache (not Clear data), then reboot the phone; if it still hangs, uninstall WhatsApp and reinstall it from the Play Store so it pulls a clean build. Also set WhatsApp to Unrestricted under Settings > Apps > WhatsApp > Battery, since One UI's optimization can stall the initialization. See how others solved this on Reddit

Yes, WhatsApp officially acknowledged a restore bug affecting the S25 series where the Google Drive backup fails to download during setup. The reliable workaround is to skip restoring during the initial WhatsApp setup, finish onboarding, then update WhatsApp to the latest version from the Play Store and trigger the restore again from Settings > Chats > Chat backup; signing in with the exact same Google account tied to the backup is essential. If Drive still fails, a local backup can be used instead - copy the WhatsApp folder from your old phone to Internal storage > Android > media > com.whatsapp > WhatsApp on the S25 before installing WhatsApp, using the same phone number. Note a local backup only works phone-to-phone on Android, not from an iPhone. See how others solved this on Reddit

Use WhatsApp's official iPhone-to-Android move, which runs through Samsung Smart Switch and needs a USB-C to Lightning cable connecting both phones. The S25 must not have finished WhatsApp setup yet - do this during initial onboarding (if you already set WhatsApp up, you'll need to factory reset or skip it). When prompted, open WhatsApp on the iPhone, go to Settings > Chats > Move chats to Android, and scan the QR code shown on the S25. Both phones must keep the same number for the transfer to complete. See how others solved this on Reddit

This is a known scroll-position glitch in how WhatsApp handles unread markers on One UI. Updating WhatsApp to the latest Play Store version fixes it for most people, and clearing the cache via Settings > Apps > WhatsApp > Storage > Clear cache helps reset the broken scroll state. As a stopgap, tap the floating down-arrow that appears in the chat to jump straight to the latest message. See how others solved this on Reddit

There are two ways. The simplest is WhatsApp's built-in multi-account feature, which lets you add a second number in the same app: open WhatsApp > Settings, tap the dropdown arrow next to your name, choose Add account, and register the second SIM/number. Alternatively use Samsung's Dual Messenger under Settings > Advanced features > Dual Messenger - toggle WhatsApp on and a cloned WhatsApp icon appears that you can register with a separate number. See how others solved this on Reddit

One UI's aggressive battery management is throttling WhatsApp in the background. Go to Settings > Apps > WhatsApp > Battery and set it to Unrestricted, then under Settings > Apps > WhatsApp > Notifications confirm the message and group categories are enabled with the correct sound. Also remove WhatsApp from Sleeping apps and turn off any adaptive limits under Settings > Battery > Background usage limits so notifications arrive instantly. See how others solved this on Reddit