MI service centres are quite decent I suppose. My friend’s note 3’s motherboard died while updating. He submitted the phone to the service centre and the next day he recieved a call that the phone was ready. But, again we had issues and we submitted the phone, after 2 days we recieved a call about the phone being ready. The service was quite fast, generally if this would be the case with another brand’s service centre, I guess it would have consumed almost 10-15 days.