Hello I have recovered my yi cam (SN:23L...) with efl files from 22L without problem and them reinstall firmware 1.2.12 from xiaoyi web for 23L cam's but in the phone app show different serial number starting with 22..and the last digit of wifi SSID doesn't match with the last digit of original SN like before recover it, any idea how to change serial number and default wifi SSID??thanks