How to sign on mobile phone? As an office worker, do you have such troubles: when you are on a business trip, someone sends you a document and asks you to sign for it remotely; when you open the signature software and want to sign, the software reminds you that you need to become a member? Don’t worry, here’s how to sign for free. Tool Mobile WPS step-by-step reading method/step one/9 First, you need to download the WPS Office app on your mobile phone. It can be downloaded directly from the app store and is free. 2/9 Secondly, select the file that needs to be signed. Please note that the file must be in PDF format. If the other party needs your signature, you need to scan the PDF and send it to you. 3/9 Open the file to be signed, select other applications to open → and then select WPS Office → OK. 4/9 After opening the file, click "Tools" in the lower left corner, and then select "Mark" → PDF Signature. 5/9 At this time, it is in an editing state. Click the "+" sign in the upper right corner to create a signature. 6/9 After clicking to create a signature, you will enter signature mode. At this time, you can write your name directly on your phone. 7/9 Drag your name to the desired location and click Done in the upper left corner. 8/9 Then click Tools → File → Save As in the lower left corner to save the signed file to the designated folder on your phone. 9/9 Return to our WeChat, open "File" in the dialog box, find the folder where we saved the file, select the file we signed, and resend it to the other party. Things to note, I hope this helps everyone.