Legal analysis: Whether writing your phone number on someone else’s brand counts as infringement can only be determined based on the actual situation. If you get the consent of the person involved in the brand, writing your phone number on someone else's brand does not constitute infringement.

If the perpetrator writes his or her phone number on someone else's sign without the consent of the person involved in the sign, but no damage has been caused, it does not constitute an infringement. An actor shall bear tort liability only when he infringes upon the civil rights and interests of others due to fault.

Legal basis: Article 57 of the "Trademark Law of the People's Republic of China" Any of the following acts is an infringement of the exclusive right to register a trademark:

(1) ) Using the same trademark as its registered trademark on the same kind of goods without the permission of the trademark registrant;

(2) Using the same kind of trademark as its registered trademark on the same kind of goods without the permission of the trademark registrant Similar trademarks, or using a trademark that is the same or similar to its registered trademark on similar goods, which is likely to cause confusion;

(3) Selling goods that infringe the exclusive rights of registered trademarks;

(4) Counterfeiting or manufacturing other people’s registered trademarks without authorization or selling counterfeit or unauthorized registered trademarks;

(5) Replacing the registered trademark without the consent of the trademark registrant and replacing the replaced trademark The goods are put into the market;

(6) Deliberately providing facilities for infringement of the exclusive rights of others’ trademarks and helping others to infringe the exclusive rights of trademarks;

(7) Giving Any other damage caused by the exclusive right to use a registered trademark of others.