How do I fix iPhone 7 haptics not working during calls?

This is a user to user forum, I would suggest you seek help from Apple if you want this resolved ASAP.

Make an appointment at the Genius Bar to have it diagnosed.

Genius Bar Reservation and Apple Support Options - Apple

You're doing fine explaining! Based on what you've described, it sounds like your iPhone 7's Taptic Engine (the vibration/haptic motor) is glitching—specifically when:

• You receive calls or haptic-heavy app activity
• The engine stops responding
• You temporarily fix it by toggling silent mode and doing a force restart (Power + Volume Down), but it's inconsistent

Here are a few possible causes and steps to try:

✅ Basic Troubleshooting

1. iOS Update: Make sure your iPhone 7 is running the latest version of iOS it supports (likely iOS 15.x). Some haptic bugs have been fixed in updates.
2. Reset All Settings:

• • Go to Settings > General > Transfer or Reset iPhone > Reset > Reset All Settings.
  • This won’t delete your data, but will reset preferences (like Wi-Fi passwords, display settings).

1. Check Haptic Settings:

• • Go to Settings > Sounds & Haptics and make sure System Haptics is enabled.
  • Under Vibrate on Ring/Silent, toggle both off, then on again.

🔍 Deeper Checks

1. Diagnostics Test (Optional but helpful):

• • Use Apple’s Support App or go to getsupport.apple.com, schedule a chat or call, and request a remote diagnostic—they can test the Taptic Engine remotely.

1. Check for App Conflicts:

• • Do you notice this issue with specific apps (e.g., WhatsApp, Telegram, etc.)? Some apps might call the haptics excessively or crash it.
  • Try deleting any app that triggers the issue and see if it helps.

🔧 Hardware-Related Possibilities

• The Taptic Engine itself may be failing or loose connection (common in older iPhone 7 units).
• If the phone was dropped or had water damage, the connection may be spotty—especially since it's intermittent.
• If you’re tech-savvy or willing, a local repair shop can reseat or test the Taptic Engine. Replacing it is relatively inexpensive for older phones.

Come on, this site should be used from people to help using THEIR IDEAS ONLY and not ChatGPT