You don't need to sign a mobile phone to apply for a business license. Just download the received electronic business license into PDF, print it into paper, and finally sign it in the signature column.

Electronic business license is a legal electronic certificate issued by the market supervision department according to the relevant national laws and regulations and in accordance with unified standards and norms, which contains the registration information of market entities.

The state promotes electronic business licenses. Electronic business license and paper business license have the same legal effect.