How to sign a PDF on your Android phone or tablet, without having to print or scan

To properly sign a PDF on your Android phone or tablet, you'll need to download an app from the Google Play Store.
来自MSN

How to Scan a QR Code Using Any Android Phone or iPhone

QR codes are those square barcode-looking things that when scanned by your iPhone 16 Pro, Galaxy S25 Ultra or any other phone, can send you straight to a particular webpage or to download an app, all ...