WCN3988-000 Wi-Fi & Bluetooth IC For Qualcomm (ORG)

Technical Specifications: Original Service Part (ORG) manufactured by Qualcomm.

• Model Number: WCN3988.

• Revision: 000 (Standard Revision).

• Function: Integrated Wi-Fi (802.11ac) and Bluetooth 5.0 controller.

Common Fixes:

1. Wi-Fi Greyed Out: The Wi-Fi toggle switch cannot be turned on (stays grey).

2. No Bluetooth: Bluetooth fails to enable or cannot find devices.

3. Weak Signal: Device connects but drops connection frequently or has very short range.

4. MAC Address Error: Wi-Fi MAC address shows as “02:00:00:00:00:00” or Unavailable.

Compatibility: A very common chip found in popular devices, including:

• Xiaomi / Redmi: Redmi Note 7, Redmi Note 8, Redmi Note 8T, Mi A2, Mi 8 Lite.

• Samsung: Galaxy A70 (A705), Galaxy A80 (A805), Galaxy A60.

• Nokia: Nokia 6.1 Plus, 7.1.

Technician Note: Before replacing this IC for a “Greyed out” issue, please check the WLAN_EN voltage and the Crystal Oscillator nearby, as they can cause similar symptoms.