SKY03O firmware(this firmware is not applicable for SKY03S or original SKY03, only for SKY03O)
SKY03S firmware(this firmware is not applicable for SKY03O or original SKY03, only for SKY03S)
SKY03 NEW firmware(this firmware is not applicable for SKY03S or SKY03O, only for SKY03)
SKY03 OLD firmware(this firmware is not applicable for SKY03S or SKY03O, only for SKY03)