I would like to ask why the mobile phone wps signature disappeared after it was sent out. The reason why the wps signature of the mobile phone is gone is because:

1. file is saved in an incorrect location: When using WPS to sign the file, please make sure to choose the correct location to save the file. If you don't specify a save location, by default, the file may be saved to a temporary folder on your mobile phone, which may cause the signed file to disappear after being sent. Please check the storage space of your mobile phone to ensure that the file is saved correctly.

2. Incorrect sending method: After signing, you may send files in an incorrect way, such as through applications or social media platforms. Some applications may compress or convert files, which may result in the loss of signature files. It is recommended that you try to use other transmission methods, such as e-mail or cloud storage services, to ensure the accuracy of file transmission.

3. The file has been deleted: If you delete the file before sending the signature file, the file will definitely disappear. Please check the file storage of your mobile phone again to ensure that the file has not been accidentally deleted.