How To Fix iPhone Bluetooth and Wifi is Not Working in iOS 17

The new iOS 17 was released yesterday, but according to Mixpanel, the adoption rate (about 10 percent) is slightly slower than adoption of iOS 10 at launch (which was just over 14 percent after 24 hours). Following with excitement, various iOS 17 issues/changes have been reported by early adopters too. Here are some variations of the Bluetooth/Wi-Fi option in Control Center that you should be aware of (2020 Most Common iPhone X Problems and How To Fix Them).

Alert: Found your iPhone is getting sluggish after updating to iOS 17? Don't be panic. Follow this tutorial to learn Why Is My iPhone So Slow and How To Fix.

iOS 17 Wifi Problems

iOS 17 Adoption Rate (First 24 Hours)

#1 - Old iPhone Battery Saving Magic
May Not Work That Good

In the previous version of iOS, tapping the Bluetooth / Wifi button in Control Center will completely disable Bluetooth / Wifi option. In other word, you can shut down Bluetooth / Wifi module from the hardware level. And this was a very common trick for saving iPhone battery life (How To Fix iPhone X Error 4013). But in iOS 17, you'd better don't expect too much on this 'iPhone Battery Saving Magic'. According to support document from Apple:

In iOS 17 and later, when you toggle the Wi-Fi or Bluetooth buttons in Control Center, your device will immediately disconnect from Wi-Fi and Bluetooth accessories. Wi-Fi and Bluetooth will continue to be available, so you can use these important features:
  1. AirDrop,
  2. AirPlay,
  3. Apple Pencil,
  4. Apple Watch,
  5. Continuity features (like Handoff and Instant Hotspot),
  6. Instant Hotspot,
  7. Location Services.

#2 - Your iPhone Will Auto Join
Nearby Wi-Fi Networks

Even while the Wi-Fi option is disabled in Control Center, your iPhone may still auto join for nearby Wi-Fi networks in certain circumstances (How To Fix iCloud Reminders Not Syncing with iPhone iPad and Mac). So be aware of your privacy and cellular data usage.

Auto-join for any nearby Wi-Fi networks when:
  1. You walk or drive to a new location,
  2. It's 5 AM local time (it seems so far there is no on/off for this),
  3. You restart your device,
  4. You turn off / on Flight Mode.

#3 - You Can Still Truly Turn Off
Bluetooth / Wifi, Manually

According to an Apple documentation, disabling Bluetooth/Wifi in the Settings app really does turn it off (How To Fix iTunes Error 50). But for average iOS users who have been trained since 2013, these changes are one of the handful of iOS 17 adoption pains.

iOS 17 Wifi Problems

Completely Turn Off Bluetooth in iOS 17

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