Sorry but I don't get too involved with aftermarket accessories...
This is what I can offer> Did the OEM radio produce sound?
Yes: refer to the installation instructions that came with the android head unit then:
remove the head unit
disconnect all aftermarket connections
inspect ALL connections for damaged, loose or mis-set terminals especially the speaker circuits.
No: remove the accessory head unit. Reinstall the OEM audio unit, then trouble shoot the problem.
(see link in my sig line)
OR, return the car to whom ever installed it and have them recheck their work.
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