Key Specifications & Features
- Integrated Components: The sub-board typically features the Micro-USB dock port, the main lower microphone (MIC), and the coaxial antenna cable terminal connector.
- Compatibility: It is built xplicitly for the Micro-USB logic setup of the Infinix Smart HD 2021 X612 variants.
- Functionality: Replacing this entire flex board fixes common issues such as slow or loose phone charging, failure to connect to computers via USB, or people not being able to hear you on phone calls due to a broken microphone.
Repair Tips
- Ensure the phone is completely powered off and the battery is unplugged before swapping out the internal boards.
- Gently detach the delicate antenna wire from the old board so you do not snap the tiny gold connector prong.





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