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For Benz Star C4 SD Connect unlocker unblock chip: PIC*6LF*8

You may make your SD Connect locked with following signal:
1. have you got "!" in the lilttle screen of sd connect, and shows " device not in use"?
2. have you got a messenge on the screen suggestting an update? and updating, your sd connect becomes a brick?

Yes, your c4 is locked, as the serial number is overdue, so your sd connect is blacklisted by hardware lock.

What you need is a unlock service.

we will offer a serial number chip for you to unlock your C4. Differ from sending back your C4, it is quicker and easy, as well as economic.

After get the chip, just change it as our engineers show( by video or file), then your C4 will go to normal.