IPhone 11 Pro No Service, Searching for Network, No IMEI

Problem: The customer reported that their iPhone 11 Pro displayed "No Service" and was continuously searching for a network. Additionally, the device showed no IMEI number, indicating a serious connectivity issue.

Diagnosis: After conducting a thorough diagnostic check, we discovered that several pads between the two boards in the iPhone's sandwich structure were missing. These missing pads were crucial for the network and baseband functionality.

Steps for Fixing:

1. Initial Inspection: Verified the reported issues by checking the network status and confirming the absence of an IMEI number in the device settings.
2. Disassembly: Carefully disassembled the iPhone 11 Pro to separate the two boards in the sandwich structure, taking care to avoid further damage to the delicate components.
3. Identification of Missing Pads: Using ZXW schematics software, identified the missing pads that were critical for network and baseband connections.
4. Planting New Pads:
   • Cleaned the affected areas on both boards to prepare for new pad installation.
   • Carefully planted new pads in place of the missing ones using precise microsoldering techniques.
   • Ensured each pad was securely connected and aligned correctly to restore the necessary electrical pathways.
5. Verification: Double-checked all connections with ZXW schematics software to ensure accuracy and integrity of the repairs.
6. Reassembly: Carefully reassembled the iPhone 11 Pro, ensuring all connections were properly secured and the device was correctly reassembled.
7. Testing: Powered on the device and checked for network service, IMEI number, and overall functionality. Conducted multiple tests to confirm the repair was successful.

Final Fix: Planting new pads in place of the missing ones successfully restored the network connectivity and IMEI number of the iPhone 11 Pro. The phone now connects to networks and functions perfectly, much to the customer’s satisfaction.