Ah, the joys of modern technology, where everything is supposed to make life easier but sometimes just ends up driving us up the wall. Alright, let's get that iPhone 7 back to the beacon of reliability Apple promises it to be, shall we?
1. **Check Your Settings, Einstein**: Make sure you didn't accidentally turn off notifications for WhatsApp. Go to Settings > Notifications > WhatsApp. Everything should be on, unless you've gone into tech monk mode and silenced it yourself.
2. **The Almighty Restart**: The classic "Have you tried turning it off and on again?" maneuver. Seriously, do it. It's the chicken soup of tech solutions.
3. **Update, Update, Update**: You're on iOS 15, but are you on the latest version of iOS 15? What about WhatsApp? Go to Settings > General > Software Update and the App Store to check. Updates are like vitamins for your phone.
4. **Network Woes**: The message says "mobile network problem," huh? Try toggling Airplane Mode on and off to refresh that finicky network connection.
5. **Data & Wi-Fi**: WhatsApp notifications need internet. So, make sure either Wi-Fi or mobile data is working. If they're both on, it's like doubling your chances at a raffle, except the prize is a functioning app.
6. **Reinstall WhatsApp**: The nuclear option. Delete and reinstall the app. Make sure you backup your chats unless you want to forget Aunt Karen's birthday wishes from last year.
7. **The SIM-ple Solution**: Sometimes the SIM card goes on a little vacation. Remove it, blow on it like it's an ancient video game cartridge, and put it back in.
8. **Consult the Oracle**: Or, in less mythical terms, Apple Support or your service provider. Maybe they'll offer a magical solution.
9. **Complain on Social Media**: The modern-day equivalent of screaming into the void. Sometimes it works; companies hate bad publicity.
Alright, give those a whirl and see if any of them bring your phone back from its digital sabbatical.