Hey there, sorry to hear your OnePlus 2 is giving you USB connection headaches after the system update—let’s walk through some targeted fixes that might get things working again, since the usual solutions haven’t panned out for you.

1. Rule Out Hardware/Cable Problems First #

• Swap to a genuine USB data cable (cheap charging-only cables won’t support data transfer or network sharing).
• Try different USB ports on your computer—preferably rear USB ports on desktops, as they provide more stable power.
• Test connecting to another computer entirely to eliminate PC-side issues.

2. Force USB Mode Selection (Since the Prompt Disappeared) #

The system update likely reset your USB preference settings. Here’s how to bring back the mode options:

1. Enable Developer Options: Go to Settings > About Phone, then tap the Build Number 7 times until you see the "You are now a developer" message.
2. Open Developer Options (usually at the bottom of Settings) and toggle on USB debugging.
3. Reconnect the USB cable to your computer. If the mode selection prompt still doesn’t appear in the notification shade, go back to Developer Options and find Select USB Configuration—manually choose MTP (Media Transfer Protocol) or File Transfer mode.

3. Fix the Grayed-Out USB Tethering Option #

USB tethering relies on a working data connection between your phone and PC, so let’s address that first:

• Ensure you’ve successfully set up MTP/file transfer mode (from step 2) before trying to enable tethering.
• Turn off Wi-Fi and mobile data on your phone, then try toggling the USB tethering option again—network conflicts often cause this setting to gray out.
• Check Developer Options for a separate USB Network Sharing toggle (nomenclature varies by system version) and try enabling that instead.

4. Reset USB-Related System Settings #

System updates can leave behind corrupted setting caches. Try this non-destructive reset:

1. Go to Settings > System > Reset Options > Reset App Preferences. This won’t delete your personal data, just reset app permissions, default apps, and similar settings.
2. Reboot your phone, then reconnect the USB cable to test the connection.

5. Update or Reinstall PC Drivers #

• Windows: Open Device Manager, look for a device labeled "OnePlus" with a yellow exclamation mark. Right-click it, select Update Driver > Browse my computer for drivers, and let Windows search its default driver store. If that fails, manually download the official OnePlus 2 driver package (avoid third-party driver tools).
• Mac: Make sure you have Android File Transfer installed. Unplug your phone, restart both the Mac and phone, then reconnect.

6. Temporary Workarounds (If All Else Fails) #

• For file transfer: Use OnePlus Cloud to sync files between your phone and PC, or use Bluetooth (note: it’s slower than USB).
• For network sharing: Switch to Wi-Fi hotspot mode instead of USB tethering to share your phone’s internet connection.

内容的提问来源于stack exchange，提问作者Michel